56635543161 has 24 divisors (see below), whose sum is σ = 82604261376. Its totient is φ = 37389609600.

The previous prime is 56635543141. The next prime is 56635543169. The reversal of 56635543161 is 16134553665.

It is a happy number.

56635543161 is a `hidden beast` number, since 5 + 6 + 6 + 3 + 554 + 31 + 61 = 666.

It is not a de Polignac number, because 56635543161 - 2⁷ = 56635543033 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (56635543169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1146376 + ... + 1194758.

It is an arithmetic number, because the mean of its divisors is an integer number (3441844224).

Almost surely, 2^56635543161 is an apocalyptic number.

It is an amenable number.

56635543161 is a deficient number, since it is larger than the sum of its proper divisors (25968718215).

56635543161 is a wasteful number, since it uses less digits than its factorization.

56635543161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49653 (or 49650 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The spelling of 56635543161 in words is "fifty-six billion, six hundred thirty-five million, five hundred forty-three thousand, one hundred sixty-one".