65511311516 has 48 divisors (see below), whose sum is σ = 143915036160. Its totient is φ = 25442112960.

The previous prime is 65511311479. The next prime is 65511311543. The reversal of 65511311516 is 61511311556.

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, 2664755 + ... + 2689226.

It is an arithmetic number, because the mean of its divisors is an integer number (2998229920).

Almost surely, 2^65511311516 is an apocalyptic number.

It is an amenable number.

65511311516 is an abundant number, since it is smaller than the sum of its proper divisors (78403724644).

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

65511311516 is a wasteful number, since it uses less digits than its factorization.

65511311516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354034 (or 5354032 counting only the distinct ones).

The product of its digits is 13500, while the sum is 35.

The spelling of 65511311516 in words is "sixty-five billion, five hundred eleven million, three hundred eleven thousand, five hundred sixteen".