165212521260 has 24 divisors (see below), whose sum is σ = 462595059696. Its totient is φ = 44056672320.

The previous prime is 165212521259. The next prime is 165212521289. The reversal of 165212521260 is 62125212561.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376770951 + ... + 1376771070.

It is an arithmetic number, because the mean of its divisors is an integer number (19274794154).

Almost surely, 2^165212521260 is an apocalyptic number.

165212521260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165212521260 is an abundant number, since it is smaller than the sum of its proper divisors (297382538436).

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

165212521260 is a wasteful number, since it uses less digits than its factorization.

165212521260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753542033 (or 2753542031 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 165212521260 in words is "one hundred sixty-five billion, two hundred twelve million, five hundred twenty-one thousand, two hundred sixty".