65317404672 has 384 divisors, whose sum is σ = 211066739520. Its totient is φ = 20065812480.

The previous prime is 65317404667. The next prime is 65317404683. The reversal of 65317404672 is 27640471356.

65317404672 is a `hidden beast` number, since 6 + 531 + 7 + 4 + 0 + 46 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103513797 + ... + 103514427.

Almost surely, 2^65317404672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65317404672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105533369760).

65317404672 is an abundant number, since it is smaller than the sum of its proper divisors (145749334848).

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

65317404672 is an frugal number, since it uses more digits than its factorization.

65317404672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 65317404672 in words is "sixty-five billion, three hundred seventeen million, four hundred four thousand, six hundred seventy-two".