155540155554 has 40 divisors (see below), whose sum is σ = 398314475328. Its totient is φ = 44440044120.

The previous prime is 155540155499. The next prime is 155540155609. The reversal of 155540155554 is 455551045551.

155540155554 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 40 + 1 + 55 + 554 = 666.

155540155554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155540155499) and next prime (155540155609).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68579182 + ... + 68581449.

Almost surely, 2^155540155554 is an apocalyptic number.

155540155554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

155540155554 is an abundant number, since it is smaller than the sum of its proper divisors (242774319774).

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

155540155554 is a wasteful number, since it uses less digits than its factorization.

155540155554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137160652 (or 137160643 counting only the distinct ones).

The product of its (nonzero) digits is 1250000, while the sum is 45.

The spelling of 155540155554 in words is "one hundred fifty-five billion, five hundred forty million, one hundred fifty-five thousand, five hundred fifty-four".