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131309418072 = 233717229179521
BaseRepresentation
bin111101001001010100…
…1101011011001011000
3110112221011211120112110
41322102221223121120
54122410202334242
6140153412312320
712325653431520
oct1722251533130
9415834746473
10131309418072
115076281a328
12215473126a0
13c4c8259521
1464d935c680
153637cb439c
hex1e92a6b658

131309418072 has 384 divisors, whose sum is σ = 415378368000. Its totient is φ = 33836974080.

The previous prime is 131309418011. The next prime is 131309418139. The reversal of 131309418072 is 270814903131.

It is a self number, because there is not a number n which added to its sum of digits gives 131309418072.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 252033172 + ... + 252033692.

It is an arithmetic number, because the mean of its divisors is an integer number (1081714500).

Almost surely, 2131309418072 is an apocalyptic number.

131309418072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131309418072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207689184000).

131309418072 is an abundant number, since it is smaller than the sum of its proper divisors (284068949928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131309418072 is a wasteful number, since it uses less digits than its factorization.

131309418072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 131309418072 in words is "one hundred thirty-one billion, three hundred nine million, four hundred eighteen thousand, seventy-two".