715061616561 has 18 divisors (see below), whose sum is σ = 1097197586342. Its totient is φ = 448666110720.

The previous prime is 715061616559. The next prime is 715061616589. The reversal of 715061616561 is 165616160517.

715061616561 is a `hidden beast` number, since 7 + 15 + 0 + 61 + 6 + 16 + 561 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 126918337536 + 588143279025 = 356256^2 + 766905^2 .

It is not a de Polignac number, because 715061616561 - 2¹ = 715061616559 is a prime.

It is a super-2 number, since 2×715061616561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715061616361) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 137456380 + ... + 137461581.

Almost surely, 2^715061616561 is an apocalyptic number.

It is an amenable number.

715061616561 is a deficient number, since it is larger than the sum of its proper divisors (382135969781).

715061616561 is a wasteful number, since it uses less digits than its factorization.

715061616561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274918001 (or 274917981 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 715061616561 in words is "seven hundred fifteen billion, sixty-one million, six hundred sixteen thousand, five hundred sixty-one".