65615672568 has 32 divisors (see below), whose sum is σ = 164945486160. Its totient is φ = 21751050240.

The previous prime is 65615672561. The next prime is 65615672581. The reversal of 65615672568 is 86527651656.

It is a super-4 number, since 4×65615672568⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65615672561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7548105 + ... + 7556792.

Almost surely, 2^65615672568 is an apocalyptic number.

It is an amenable number.

65615672568 is an abundant number, since it is smaller than the sum of its proper divisors (99329813592).

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

65615672568 is a wasteful number, since it uses less digits than its factorization.

65615672568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15105087 (or 15105083 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 57.

The spelling of 65615672568 in words is "sixty-five billion, six hundred fifteen million, six hundred seventy-two thousand, five hundred sixty-eight".