65331507939816 has 16 divisors (see below), whose sum is σ = 163328769849600. Its totient is φ = 21777169313264.

The previous prime is 65331507939811. The next prime is 65331507939881. The reversal of 65331507939816 is 61893970513356.

It is a super-2 number, since 2×65331507939816² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65331507939811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361073082056 + ... + 1361073082103.

It is an arithmetic number, because the mean of its divisors is an integer number (10208048115600).

Almost surely, 2^{65331507939816} is an apocalyptic number.

It is an amenable number.

65331507939816 is an abundant number, since it is smaller than the sum of its proper divisors (97997261909784).

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

65331507939816 is a wasteful number, since it uses less digits than its factorization.

65331507939816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722146164168 (or 2722146164164 counting only the distinct ones).

The product of its (nonzero) digits is 110224800, while the sum is 66.

The spelling of 65331507939816 in words is "sixty-five trillion, three hundred thirty-one billion, five hundred seven million, nine hundred thirty-nine thousand, eight hundred sixteen".