165610656510 has 32 divisors (see below), whose sum is σ = 428039851680. Its totient is φ = 40765699968.

The previous prime is 165610656473. The next prime is 165610656569. The reversal of 165610656510 is 15656016561.

It is a Curzon number.

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, 212320965 + ... + 212321744.

It is an arithmetic number, because the mean of its divisors is an integer number (13376245365).

Almost surely, 2^165610656510 is an apocalyptic number.

165610656510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165610656510 is an abundant number, since it is smaller than the sum of its proper divisors (262429195170).

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

165610656510 is a wasteful number, since it uses less digits than its factorization.

165610656510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424642732.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 165610656510 in words is "one hundred sixty-five billion, six hundred ten million, six hundred fifty-six thousand, five hundred ten".