139427632521 has 12 divisors (see below), whose sum is σ = 201481163520. Its totient is φ = 92912203800.

The previous prime is 139427632499. The next prime is 139427632613. The reversal of 139427632521 is 125236724931.

It is a happy number.

139427632521 is a `hidden beast` number, since 1 + 3 + 9 + 4 + 2 + 7 + 632 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 139427632521 - 2⁵ = 139427632489 is a prime.

It is a super-2 number, since 2×139427632521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139427632121) 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, 3273601 + ... + 3315918.

It is an arithmetic number, because the mean of its divisors is an integer number (16790096960).

Almost surely, 2^139427632521 is an apocalyptic number.

It is an amenable number.

139427632521 is a deficient number, since it is larger than the sum of its proper divisors (62053530999).

139427632521 is a wasteful number, since it uses less digits than its factorization.

139427632521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6591876 (or 6591873 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 139427632521 in words is "one hundred thirty-nine billion, four hundred twenty-seven million, six hundred thirty-two thousand, five hundred twenty-one".