65081609376 has 48 divisors (see below), whose sum is σ = 195244830144. Its totient is φ = 18594745344.

The previous prime is 65081609317. The next prime is 65081609381. The reversal of 65081609376 is 67390618056.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×65081609376² (a number of 22 digits) contains 22 as substring.

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, 48423145 + ... + 48424488.

It is an arithmetic number, because the mean of its divisors is an integer number (4067600628).

Almost surely, 2^65081609376 is an apocalyptic number.

It is an amenable number.

65081609376 is an abundant number, since it is smaller than the sum of its proper divisors (130163220768).

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

65081609376 is a wasteful number, since it uses less digits than its factorization.

65081609376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96847653 (or 96847645 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 65081609376 in words is "sixty-five billion, eighty-one million, six hundred nine thousand, three hundred seventy-six".