139139204256 has 72 divisors (see below), whose sum is σ = 426113824500. Its totient is φ = 42812061696.

The previous prime is 139139204233. The next prime is 139139204257. The reversal of 139139204256 is 652402931931.

139139204256 is a `hidden beast` number, since 1 + 3 + 9 + 1 + 392 + 0 + 4 + 256 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119912608656 + 19226595600 = 346284^2 + 138660^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (139139204257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18577881 + ... + 18585368.

Almost surely, 2^139139204256 is an apocalyptic number.

139139204256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139139204256 is an abundant number, since it is smaller than the sum of its proper divisors (286974620244).

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

139139204256 is a wasteful number, since it uses less digits than its factorization.

139139204256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37163278 (or 37163267 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 139139204256 in words is "one hundred thirty-nine billion, one hundred thirty-nine million, two hundred four thousand, two hundred fifty-six".