715661613 has 12 divisors (see below), whose sum is σ = 1043771040. Its totient is φ = 472475016.

The previous prime is 715661603. The next prime is 715661647. The reversal of 715661613 is 316166517.

715661613 is a `hidden beast` number, since 71 + 566 + 16 + 13 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-715661613 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715661603) 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, 385083 + ... + 386936.

It is an arithmetic number, because the mean of its divisors is an integer number (86980920).

Almost surely, 2^715661613 is an apocalyptic number.

It is an amenable number.

715661613 is a deficient number, since it is larger than the sum of its proper divisors (328109427).

715661613 is a wasteful number, since it uses less digits than its factorization.

715661613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772128 (or 772125 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 715661613 is about 26751.8525152932. The cubic root of 715661613 is about 894.4771299616.

The spelling of 715661613 in words is "seven hundred fifteen million, six hundred sixty-one thousand, six hundred thirteen".