664401236613453 has 12 divisors (see below), whose sum is σ = 968183512942620. Its totient is φ = 439014386434176.

The previous prime is 664401236613437. The next prime is 664401236613467. The reversal of 664401236613453 is 354316632104466.

664401236613453 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 0 + 1 + 236 + 61 + 345 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 211181290998084 + 453219945615369 = 14532078^2 + 21288963^2 .

It is not a de Polignac number, because 664401236613453 - 2⁴ = 664401236613437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664401236613453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664401256613453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326647607938 + ... + 326647609971.

It is an arithmetic number, because the mean of its divisors is an integer number (80681959411885).

Almost surely, 2^{664401236613453} is an apocalyptic number.

It is an amenable number.

664401236613453 is a deficient number, since it is larger than the sum of its proper divisors (303782276329167).

664401236613453 is a wasteful number, since it uses less digits than its factorization.

664401236613453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653295218028 (or 653295218025 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 54.

The spelling of 664401236613453 in words is "six hundred sixty-four trillion, four hundred one billion, two hundred thirty-six million, six hundred thirteen thousand, four hundred fifty-three".