6981560599538 has 18 divisors (see below), whose sum is σ = 12182156483661. Its totient is φ = 2992086189624.

The previous prime is 6981560599537. The next prime is 6981560599561. The reversal of 6981560599538 is 8359950651896.

It can be written as a sum of positive squares in 2 ways, for example, as 6934832427649 + 46728171889 = 2633407^2 + 216167^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1868363.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6981560599537) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26023628 + ... + 26290536.

Almost surely, 2^{6981560599538} is an apocalyptic number.

6981560599538 is a deficient number, since it is larger than the sum of its proper divisors (5200595884123).

6981560599538 is an frugal number, since it uses more digits than its factorization.

6981560599538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533834 (or 266918 counting only the distinct ones).

The product of its (nonzero) digits is 629856000, while the sum is 74.

The spelling of 6981560599538 in words is "six trillion, nine hundred eighty-one billion, five hundred sixty million, five hundred ninety-nine thousand, five hundred thirty-eight".