13074738561 has 12 divisors (see below), whose sum is σ = 18889127140. Its totient is φ = 8714926080.

The previous prime is 13074738491. The next prime is 13074738577. The reversal of 13074738561 is 16583747031.

13074738561 is a `hidden beast` number, since 13 + 0 + 7 + 4 + 73 + 8 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7701115536 + 5373623025 = 87756^2 + 73305^2 .

It is not a de Polignac number, because 13074738561 - 2⁹ = 13074738049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13074738661) 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, 76480 + ... + 178881.

Almost surely, 2^13074738561 is an apocalyptic number.

It is an amenable number.

13074738561 is a deficient number, since it is larger than the sum of its proper divisors (5814388579).

13074738561 is a wasteful number, since it uses less digits than its factorization.

13074738561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261056 (or 261053 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 13074738561 in words is "thirteen billion, seventy-four million, seven hundred thirty-eight thousand, five hundred sixty-one".