717664401 has 16 divisors (see below), whose sum is σ = 1125748800. Its totient is φ = 450298944.

The previous prime is 717664399. The next prime is 717664411. The reversal of 717664401 is 104466717.

717664401 is a `hidden beast` number, since 7 + 1 + 7 + 6 + 644 + 0 + 1 = 666.

It is not a de Polignac number, because 717664401 - 2¹ = 717664399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (717664411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781311 + ... + 782228.

It is an arithmetic number, because the mean of its divisors is an integer number (70359300).

Almost surely, 2^717664401 is an apocalyptic number.

It is an amenable number.

717664401 is a deficient number, since it is larger than the sum of its proper divisors (408084399).

717664401 is a wasteful number, since it uses less digits than its factorization.

717664401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563565 (or 1563559 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 717664401 is about 26789.2590603025. The cubic root of 717664401 is about 895.3107546305.

It can be divided in two parts, 71766 and 4401, that added together give a palindrome (76167).

The spelling of 717664401 in words is "seven hundred seventeen million, six hundred sixty-four thousand, four hundred one".