56786590171 has 4 divisors (see below), whose sum is σ = 56791364872. Its totient is φ = 56781815472.

The previous prime is 56786590139. The next prime is 56786590187. The reversal of 56786590171 is 17109568765.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56786590171 - 2⁵ = 56786590139 is a prime.

It is a super-2 number, since 2×56786590171² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56786590771) 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, 2369466 + ... + 2393311.

It is an arithmetic number, because the mean of its divisors is an integer number (14197841218).

Almost surely, 2^56786590171 is an apocalyptic number.

56786590171 is a deficient number, since it is larger than the sum of its proper divisors (4774701).

56786590171 is a wasteful number, since it uses less digits than its factorization.

56786590171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774700.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 56786590171 in words is "fifty-six billion, seven hundred eighty-six million, five hundred ninety thousand, one hundred seventy-one".