65610505560 has 64 divisors (see below), whose sum is σ = 196910196480. Its totient is φ = 17489141120.

The previous prime is 65610505547. The next prime is 65610505601. The reversal of 65610505560 is 6550501656.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195709 + ... + 411731.

It is an arithmetic number, because the mean of its divisors is an integer number (3076721820).

Almost surely, 2^65610505560 is an apocalyptic number.

65610505560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65610505560 is an abundant number, since it is smaller than the sum of its proper divisors (131299690920).

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

65610505560 is a wasteful number, since it uses less digits than its factorization.

65610505560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218568 (or 218564 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 65610505560 in words is "sixty-five billion, six hundred ten million, five hundred five thousand, five hundred sixty".