155138814558530 has 64 divisors (see below), whose sum is σ = 322755233109120. Its totient is φ = 53062840704000.

The previous prime is 155138814558521. The next prime is 155138814558619. The reversal of 155138814558530 is 35855418831551.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22593821 + ... + 28648880.

It is an arithmetic number, because the mean of its divisors is an integer number (5043050517330).

Almost surely, 2^{155138814558530} is an apocalyptic number.

155138814558530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155138814558530 is an abundant number, since it is smaller than the sum of its proper divisors (167616418550590).

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

155138814558530 is a wasteful number, since it uses less digits than its factorization.

155138814558530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51244355.

The product of its (nonzero) digits is 57600000, while the sum is 62.

The spelling of 155138814558530 in words is "one hundred fifty-five trillion, one hundred thirty-eight billion, eight hundred fourteen million, five hundred fifty-eight thousand, five hundred thirty".