65172420684 has 72 divisors (see below), whose sum is σ = 196461807360. Its totient is φ = 17811094752.

The previous prime is 65172420671. The next prime is 65172420689. The reversal of 65172420684 is 48602427156.

It is not an unprimeable number, because it can be changed into a prime (65172420689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5616394 + ... + 5627985.

Almost surely, 2^65172420684 is an apocalyptic number.

It is an amenable number.

65172420684 is an abundant number, since it is smaller than the sum of its proper divisors (131289386676).

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

65172420684 is a wasteful number, since it uses less digits than its factorization.

65172420684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11244419 (or 11244414 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 65172420684 in words is "sixty-five billion, one hundred seventy-two million, four hundred twenty thousand, six hundred eighty-four".