56861016865 has 8 divisors (see below), whose sum is σ = 68908797288. Its totient is φ = 45038428800.

The previous prime is 56861016859. The next prime is 56861016871.

56861016865 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (56861016859) and next prime (56861016871).

It can be written as a sum of positive squares in 4 ways, for example, as 21073457889 + 35787558976 = 145167^2 + 189176^2 .

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

It is not a de Polignac number, because 56861016865 - 2³ = 56861016857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56297532 + ... + 56298541.

It is an arithmetic number, because the mean of its divisors is an integer number (8613599661).

Almost surely, 2^56861016865 is an apocalyptic number.

It is an amenable number.

56861016865 is a deficient number, since it is larger than the sum of its proper divisors (12047780423).

56861016865 is a wasteful number, since it uses less digits than its factorization.

56861016865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112596179.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 56861016865 in words is "fifty-six billion, eight hundred sixty-one million, sixteen thousand, eight hundred sixty-five".