56173553536 has 16 divisors (see below), whose sum is σ = 111908251440. Its totient is φ = 28086776704.

The previous prime is 56173553533. The next prime is 56173553567. The reversal of 56173553536 is 63535537165.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 56173553536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56173553533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219427816 + ... + 219428071.

It is an arithmetic number, because the mean of its divisors is an integer number (6994265715).

Almost surely, 2^56173553536 is an apocalyptic number.

It is an amenable number.

56173553536 is a deficient number, since it is larger than the sum of its proper divisors (55734697904).

56173553536 is an equidigital number, since it uses as much as digits as its factorization.

56173553536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438855901 (or 438855889 counting only the distinct ones).

The product of its digits is 4252500, while the sum is 49.

The spelling of 56173553536 in words is "fifty-six billion, one hundred seventy-three million, five hundred fifty-three thousand, five hundred thirty-six".