56861587617 has 8 divisors (see below), whose sum is σ = 75928105824. Its totient is φ = 37851397248.

The previous prime is 56861587613. The next prime is 56861587621. The reversal of 56861587617 is 71678516865.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56861587613) and next prime (56861587621).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56861587617 - 2² = 56861587613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56861587613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14079603 + ... + 14083640.

It is an arithmetic number, because the mean of its divisors is an integer number (9491013228).

Almost surely, 2^56861587617 is an apocalyptic number.

It is an amenable number.

56861587617 is a deficient number, since it is larger than the sum of its proper divisors (19066518207).

56861587617 is a wasteful number, since it uses less digits than its factorization.

56861587617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28163919.

The product of its digits is 16934400, while the sum is 60.

The spelling of 56861587617 in words is "fifty-six billion, eight hundred sixty-one million, five hundred eighty-seven thousand, six hundred seventeen".