138179272320 has 384 divisors, whose sum is σ = 503805744000. Its totient is φ = 34801311744.

The previous prime is 138179272291. The next prime is 138179272337. The reversal of 138179272320 is 23272971831.

138179272320 is a `hidden beast` number, since 138 + 179 + 27 + 2 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×138179272320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39287202 + ... + 39290718.

It is an arithmetic number, because the mean of its divisors is an integer number (1311994125).

Almost surely, 2^138179272320 is an apocalyptic number.

138179272320 is a gapful number since it is divisible by the number (10) 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 138179272320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251902872000).

138179272320 is an abundant number, since it is smaller than the sum of its proper divisors (365626471680).

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

138179272320 is a wasteful number, since it uses less digits than its factorization.

138179272320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 138179272320 in words is "one hundred thirty-eight billion, one hundred seventy-nine million, two hundred seventy-two thousand, three hundred twenty".