65564155 has 16 divisors (see below), whose sum is σ = 87691680. Its totient is φ = 46766592.

The previous prime is 65564141. The next prime is 65564167. The reversal of 65564155 is 55146556.

It is a de Polignac number, because none of the positive numbers 2^k-65564155 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, 18684 + ... + 21913.

It is an arithmetic number, because the mean of its divisors is an integer number (5480730).

Almost surely, 2^65564155 is an apocalyptic number.

65564155 is a deficient number, since it is larger than the sum of its proper divisors (22127525).

65564155 is a wasteful number, since it uses less digits than its factorization.

65564155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40638.

The product of its digits is 90000, while the sum is 37.

The square root of 65564155 is about 8097.1695672006. The cubic root of 65564155 is about 403.2324638285.

The spelling of 65564155 in words is "sixty-five million, five hundred sixty-four thousand, one hundred fifty-five".