65515079288 has 32 divisors (see below), whose sum is σ = 123616856160. Its totient is φ = 32550714240.

The previous prime is 65515079207. The next prime is 65515079291. The reversal of 65515079288 is 88297051556.

It is a super-2 number, since 2×65515079288² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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, 5462258 + ... + 5474238.

It is an arithmetic number, because the mean of its divisors is an integer number (3863026755).

Almost surely, 2^65515079288 is an apocalyptic number.

It is an amenable number.

65515079288 is a deficient number, since it is larger than the sum of its proper divisors (58101776872).

65515079288 is a wasteful number, since it uses less digits than its factorization.

65515079288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16247 (or 16243 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 56.

The spelling of 65515079288 in words is "sixty-five billion, five hundred fifteen million, seventy-nine thousand, two hundred eighty-eight".