65031399072 has 96 divisors (see below), whose sum is σ = 200832307200. Its totient is φ = 20402002944.

The previous prime is 65031399007. The next prime is 65031399079. The reversal of 65031399072 is 27099313056.

65031399072 is a `hidden beast` number, since 6 + 503 + 139 + 9 + 0 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×65031399072² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (65031399079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199072 + ... + 2228447.

It is an arithmetic number, because the mean of its divisors is an integer number (2092003200).

Almost surely, 2^65031399072 is an apocalyptic number.

It is an amenable number.

65031399072 is an abundant number, since it is smaller than the sum of its proper divisors (135800908128).

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

65031399072 is a wasteful number, since it uses less digits than its factorization.

65031399072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427555 (or 4427541 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 65031399072 in words is "sixty-five billion, thirty-one million, three hundred ninety-nine thousand, seventy-two".