56866715173 has 4 divisors (see below), whose sum is σ = 58253708268. Its totient is φ = 55479722080.

The previous prime is 56866715167. The next prime is 56866715179. The reversal of 56866715173 is 37151766865.

It is a happy number.

56866715173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (56866715167) and next prime (56866715179).

It can be written as a sum of positive squares in 2 ways, for example, as 13749438564 + 43117276609 = 117258^2 + 207647^2 .

It is a cyclic number.

It is not a de Polignac number, because 56866715173 - 2²¹ = 56864618021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56866715179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693496486 + ... + 693496567.

It is an arithmetic number, because the mean of its divisors is an integer number (14563427067).

Almost surely, 2^56866715173 is an apocalyptic number.

It is an amenable number.

56866715173 is a deficient number, since it is larger than the sum of its proper divisors (1386993095).

56866715173 is a wasteful number, since it uses less digits than its factorization.

56866715173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386993094.

The product of its digits is 6350400, while the sum is 55.

The spelling of 56866715173 in words is "fifty-six billion, eight hundred sixty-six million, seven hundred fifteen thousand, one hundred seventy-three".