155055500550 has 72 divisors (see below), whose sum is σ = 418086688656. Its totient is φ = 41198829120.

The previous prime is 155055500497. The next prime is 155055500609. The reversal of 155055500550 is 55005550551.

It is a happy number.

155055500550 is a `hidden beast` number, since 1 + 5 + 5 + 0 + 55 + 50 + 0 + 550 = 666.

It is a super-2 number, since 2×155055500550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 497314 + ... + 746613.

Almost surely, 2^155055500550 is an apocalyptic number.

155055500550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155055500550 is an abundant number, since it is smaller than the sum of its proper divisors (263031188106).

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

155055500550 is a wasteful number, since it uses less digits than its factorization.

155055500550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244222 (or 1244214 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 155055500550 in words is "one hundred fifty-five billion, fifty-five million, five hundred thousand, five hundred fifty".