165137812 has 24 divisors (see below), whose sum is σ = 330555456. Its totient is φ = 70713408.

The previous prime is 165137807. The next prime is 165137821. The reversal of 165137812 is 218731561.

It is a happy number.

It is a congruent number.

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, 52023 + ... + 55105.

It is an arithmetic number, because the mean of its divisors is an integer number (13773144).

Almost surely, 2^165137812 is an apocalyptic number.

It is an amenable number.

165137812 is an abundant number, since it is smaller than the sum of its proper divisors (165417644).

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

165137812 is a wasteful number, since it uses less digits than its factorization.

165137812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007 (or 5005 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 165137812 is about 12850.5957838538. The cubic root of 165137812 is about 548.6333141962.

The spelling of 165137812 in words is "one hundred sixty-five million, one hundred thirty-seven thousand, eight hundred twelve".