55521715065 has 16 divisors (see below), whose sum is σ = 89120393856. Its totient is φ = 29516364800.

The previous prime is 55521715057. The next prime is 55521715091. The reversal of 55521715065 is 56051712555.

It is not a de Polignac number, because 55521715065 - 2³ = 55521715057 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, 5946216 + ... + 5955545.

It is an arithmetic number, because the mean of its divisors is an integer number (5570024616).

Almost surely, 2^55521715065 is an apocalyptic number.

It is an amenable number.

55521715065 is a deficient number, since it is larger than the sum of its proper divisors (33598678791).

55521715065 is a wasteful number, since it uses less digits than its factorization.

55521715065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11902080.

The product of its (nonzero) digits is 262500, while the sum is 42.

The spelling of 55521715065 in words is "fifty-five billion, five hundred twenty-one million, seven hundred fifteen thousand, sixty-five".