155506510056 has 64 divisors (see below), whose sum is σ = 417432631680. Its totient is φ = 48099215360.

The previous prime is 155506510001. The next prime is 155506510067. The reversal of 155506510056 is 650015605551.

It is a junction number, because it is equal to n+sod(n) for n = 155506509996 and 155506510023.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2655141 + ... + 2713076.

It is an arithmetic number, because the mean of its divisors is an integer number (6522384870).

Almost surely, 2^155506510056 is an apocalyptic number.

It is an amenable number.

155506510056 is an abundant number, since it is smaller than the sum of its proper divisors (261926121624).

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

155506510056 is a wasteful number, since it uses less digits than its factorization.

155506510056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5368314 (or 5368310 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 155506510056 in words is "one hundred fifty-five billion, five hundred six million, five hundred ten thousand, fifty-six".