139536668238 has 32 divisors (see below), whose sum is σ = 304523331840. Its totient is φ = 42272770560.

The previous prime is 139536668209. The next prime is 139536668251. The reversal of 139536668238 is 832866635931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20883 + ... + 528686.

It is an arithmetic number, because the mean of its divisors is an integer number (9516354120).

Almost surely, 2^139536668238 is an apocalyptic number.

139536668238 is an abundant number, since it is smaller than the sum of its proper divisors (164986663602).

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

139536668238 is a wasteful number, since it uses less digits than its factorization.

139536668238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553432.

The product of its digits is 33592320, while the sum is 60.

The spelling of 139536668238 in words is "one hundred thirty-nine billion, five hundred thirty-six million, six hundred sixty-eight thousand, two hundred thirty-eight".