716256621 has 8 divisors (see below), whose sum is σ = 1061120960. Its totient is φ = 477504396.

The previous prime is 716256613. The next prime is 716256647. The reversal of 716256621 is 126652617.

It is a happy number.

716256621 is a `hidden beast` number, since 7 + 1 + 6 + 25 + 6 + 621 = 666.

It is not a de Polignac number, because 716256621 - 2³ = 716256613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716256601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13263985 + ... + 13264038.

It is an arithmetic number, because the mean of its divisors is an integer number (132640120).

Almost surely, 2^716256621 is an apocalyptic number.

It is an amenable number.

716256621 is a deficient number, since it is larger than the sum of its proper divisors (344864339).

716256621 is a wasteful number, since it uses less digits than its factorization.

716256621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26528032 (or 26528026 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 716256621 is about 26762.9710794598. The cubic root of 716256621 is about 894.7249536112.

The spelling of 716256621 in words is "seven hundred sixteen million, two hundred fifty-six thousand, six hundred twenty-one".