155847634138 has 12 divisors (see below), whose sum is σ = 271938218922. Its totient is φ = 66791843160.

The previous prime is 155847634109. The next prime is 155847634153. The reversal of 155847634138 is 831436748551.

It can be written as a sum of positive squares in only one way, i.e., 90133849729 + 65713784409 = 300223^2 + 256347^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 795140893 + ... + 795141088.

Almost surely, 2^155847634138 is an apocalyptic number.

155847634138 is a deficient number, since it is larger than the sum of its proper divisors (116090584784).

155847634138 is a wasteful number, since it uses less digits than its factorization.

155847634138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590281997 (or 1590281990 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The spelling of 155847634138 in words is "one hundred fifty-five billion, eight hundred forty-seven million, six hundred thirty-four thousand, one hundred thirty-eight".