155605560665 has 16 divisors (see below), whose sum is σ = 195464918016. Its totient is φ = 118772068800.

The previous prime is 155605560629. The next prime is 155605560689. The reversal of 155605560665 is 566065506551.

It is a de Polignac number, because none of the positive numbers 2^k-155605560665 is a prime.

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, 7058762 + ... + 7080771.

It is an arithmetic number, because the mean of its divisors is an integer number (12216557376).

Almost surely, 2^155605560665 is an apocalyptic number.

It is an amenable number.

155605560665 is a deficient number, since it is larger than the sum of its proper divisors (39859357351).

155605560665 is a wasteful number, since it uses less digits than its factorization.

155605560665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14139640.

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 155605560665 in words is "one hundred fifty-five billion, six hundred five million, five hundred sixty thousand, six hundred sixty-five".