65505505560 has 64 divisors (see below), whose sum is σ = 214381658880. Its totient is φ = 15880122240.

The previous prime is 65505505547. The next prime is 65505505601. The reversal of 65505505560 is 6550550556.

It is a congruent number.

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, 24811372 + ... + 24814011.

It is an arithmetic number, because the mean of its divisors is an integer number (3349713420).

Almost surely, 2^65505505560 is an apocalyptic number.

65505505560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65505505560 is an abundant number, since it is smaller than the sum of its proper divisors (148876153320).

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

65505505560 is a wasteful number, since it uses less digits than its factorization.

65505505560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49625408 (or 49625404 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 42.

The spelling of 65505505560 in words is "sixty-five billion, five hundred five million, five hundred five thousand, five hundred sixty".