155131722556 has 12 divisors (see below), whose sum is σ = 277256695968. Its totient is φ = 75915523712.

The previous prime is 155131722541. The next prime is 155131722631. The reversal of 155131722556 is 655227131551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412584181 + ... + 412584556.

It is an arithmetic number, because the mean of its divisors is an integer number (23104724664).

Almost surely, 2^155131722556 is an apocalyptic number.

It is an amenable number.

155131722556 is a deficient number, since it is larger than the sum of its proper divisors (122124973412).

155131722556 is a wasteful number, since it uses less digits than its factorization.

155131722556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825168788 (or 825168786 counting only the distinct ones).

The product of its digits is 315000, while the sum is 43.

The spelling of 155131722556 in words is "one hundred fifty-five billion, one hundred thirty-one million, seven hundred twenty-two thousand, five hundred fifty-six".