72351663464 has 16 divisors (see below), whose sum is σ = 135669761700. Its totient is φ = 36173060352.

The previous prime is 72351663443. The next prime is 72351663467. The reversal of 72351663464 is 46436615327.

It can be written as a sum of positive squares in 2 ways, for example, as 41925838564 + 30425824900 = 204758^2 + 174430^2 .

It is not an unprimeable number, because it can be changed into a prime (72351663467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233297 + ... + 446240.

Almost surely, 2^72351663464 is an apocalyptic number.

It is an amenable number.

72351663464 is a deficient number, since it is larger than the sum of its proper divisors (63318098236).

72351663464 is a wasteful number, since it uses less digits than its factorization.

72351663464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692852 (or 692848 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 47.

The spelling of 72351663464 in words is "seventy-two billion, three hundred fifty-one million, six hundred sixty-three thousand, four hundred sixty-four".