65520402556 has 48 divisors (see below), whose sum is σ = 134125770240. Its totient is φ = 27419474880.

The previous prime is 65520402529. The next prime is 65520402589.

65520402556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×65520402556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6907425 + ... + 6916903.

It is an arithmetic number, because the mean of its divisors is an integer number (2794286880).

Almost surely, 2^65520402556 is an apocalyptic number.

It is an amenable number.

65520402556 is an abundant number, since it is smaller than the sum of its proper divisors (68605367684).

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

65520402556 is a wasteful number, since it uses less digits than its factorization.

65520402556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15274 (or 15272 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 65520402556 in words is "sixty-five billion, five hundred twenty million, four hundred two thousand, five hundred fifty-six".