155566051550 has 96 divisors (see below), whose sum is σ = 356271988800. Its totient is φ = 49213992960.

The previous prime is 155566051477. The next prime is 155566051567. The reversal of 155566051550 is 55150665551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14413556 + ... + 14424344.

It is an arithmetic number, because the mean of its divisors is an integer number (3711166550).

Almost surely, 2^155566051550 is an apocalyptic number.

155566051550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155566051550 is an abundant number, since it is smaller than the sum of its proper divisors (200705937250).

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

155566051550 is a wasteful number, since it uses less digits than its factorization.

155566051550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13990 (or 13985 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 155566051550 in words is "one hundred fifty-five billion, five hundred sixty-six million, fifty-one thousand, five hundred fifty".