56861440667 has 2 divisors, whose sum is σ = 56861440668. Its totient is φ = 56861440666.

The previous prime is 56861440639. The next prime is 56861440679. The reversal of 56861440667 is 76604416865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56861440667 - 2³⁰ = 55787698843 is a prime.

It is a super-2 number, since 2×56861440667² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56861440607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430720333 + 28430720334.

It is an arithmetic number, because the mean of its divisors is an integer number (28430720334).

Almost surely, 2^56861440667 is an apocalyptic number.

56861440667 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861440667 is an equidigital number, since it uses as much as digits as its factorization.

56861440667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 56861440667 in words is "fifty-six billion, eight hundred sixty-one million, four hundred forty thousand, six hundred sixty-seven".