139537520640 has 576 divisors, whose sum is σ = 573241294080. Its totient is φ = 31890309120.

The previous prime is 139537520597. The next prime is 139537520653. The reversal of 139537520640 is 46025735931.

139537520640 is a `hidden beast` number, since 1 + 3 + 9 + 537 + 52 + 0 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17414235 + ... + 17422245.

It is an arithmetic number, because the mean of its divisors is an integer number (995210580).

Almost surely, 2^139537520640 is an apocalyptic number.

139537520640 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 139537520640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286620647040).

139537520640 is an abundant number, since it is smaller than the sum of its proper divisors (433703773440).

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

139537520640 is an frugal number, since it uses more digits than its factorization.

139537520640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060 (or 8028 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The spelling of 139537520640 in words is "one hundred thirty-nine billion, five hundred thirty-seven million, five hundred twenty thousand, six hundred forty".