23247249561 has 40 divisors (see below), whose sum is σ = 35574755040. Its totient is φ = 15123851712.

The previous prime is 23247249527. The next prime is 23247249577. The reversal of 23247249561 is 16594274232.

23247249561 is a `hidden beast` number, since 2 + 3 + 2 + 47 + 2 + 49 + 561 = 666.

It is not a de Polignac number, because 23247249561 - 2⁷ = 23247249433 is a prime.

It is a super-2 number, since 2×23247249561² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23247209561) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 636970 + ... + 672476.

It is an arithmetic number, because the mean of its divisors is an integer number (889368876).

Almost surely, 2^23247249561 is an apocalyptic number.

It is an amenable number.

23247249561 is a deficient number, since it is larger than the sum of its proper divisors (12327505479).

23247249561 is a wasteful number, since it uses less digits than its factorization.

23247249561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35715 (or 35706 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 23247249561 in words is "twenty-three billion, two hundred forty-seven million, two hundred forty-nine thousand, five hundred sixty-one".