155990586556 has 24 divisors (see below), whose sum is σ = 312006038400. Its totient is φ = 66847780272.

The previous prime is 155990586551. The next prime is 155990586581. The reversal of 155990586556 is 655685099551.

It is a super-2 number, since 2×155990586556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155990586551) 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, 146295 + ... + 577393.

It is an arithmetic number, because the mean of its divisors is an integer number (13000251600).

Almost surely, 2^155990586556 is an apocalyptic number.

It is an amenable number.

155990586556 is an abundant number, since it is smaller than the sum of its proper divisors (156015451844).

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

155990586556 is a wasteful number, since it uses less digits than its factorization.

155990586556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444033 (or 444031 counting only the distinct ones).

The product of its (nonzero) digits is 72900000, while the sum is 64.

It can be divided in two parts, 1559905 and 86556, that added together give a palindrome (1646461).

The spelling of 155990586556 in words is "one hundred fifty-five billion, nine hundred ninety million, five hundred eighty-six thousand, five hundred fifty-six".