65731402720 has 24 divisors (see below), whose sum is σ = 155290439304. Its totient is φ = 26292561024.

The previous prime is 65731402691. The next prime is 65731402769. The reversal of 65731402720 is 2720413756.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65731402720.

It is a congruent number.

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, 205410474 + ... + 205410793.

It is an arithmetic number, because the mean of its divisors is an integer number (6470434971).

Almost surely, 2^65731402720 is an apocalyptic number.

It is an amenable number.

65731402720 is an abundant number, since it is smaller than the sum of its proper divisors (89559036584).

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

65731402720 is a wasteful number, since it uses less digits than its factorization.

65731402720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410821282 (or 410821274 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 65731402720 in words is "sixty-five billion, seven hundred thirty-one million, four hundred two thousand, seven hundred twenty".