65513213072 has 20 divisors (see below), whose sum is σ = 134398430316. Its totient is φ = 30829747200.

The previous prime is 65513213069. The next prime is 65513213113. The reversal of 65513213072 is 27031231556.

It can be written as a sum of positive squares in 2 ways, for example, as 51949349776 + 13563863296 = 227924^2 + 116464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120428429 + ... + 120428972.

Almost surely, 2^65513213072 is an apocalyptic number.

It is an amenable number.

65513213072 is an abundant number, since it is smaller than the sum of its proper divisors (68885217244).

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

65513213072 is a wasteful number, since it uses less digits than its factorization.

65513213072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240857426 (or 240857420 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 65513213072 in words is "sixty-five billion, five hundred thirteen million, two hundred thirteen thousand, seventy-two".