139521671038 has 16 divisors (see below), whose sum is σ = 214959870144. Its totient is φ = 67868750880.

The previous prime is 139521671033. The next prime is 139521671059. The reversal of 139521671038 is 830176125931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139521671033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714456 + ... + 888532.

It is an arithmetic number, because the mean of its divisors is an integer number (13434991884).

Almost surely, 2^139521671038 is an apocalyptic number.

139521671038 is a deficient number, since it is larger than the sum of its proper divisors (75438199106).

139521671038 is a wasteful number, since it uses less digits than its factorization.

139521671038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184947.

The product of its (nonzero) digits is 272160, while the sum is 46.

Adding to 139521671038 its reverse (830176125931), we get a palindrome (969697796969).

The spelling of 139521671038 in words is "one hundred thirty-nine billion, five hundred twenty-one million, six hundred seventy-one thousand, thirty-eight".