56861312087 has 2 divisors, whose sum is σ = 56861312088. Its totient is φ = 56861312086.

The previous prime is 56861312051. The next prime is 56861312089. The reversal of 56861312087 is 78021316865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56861312087 - 2⁶ = 56861312023 is a prime.

Together with 56861312089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56861312089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430656043 + 28430656044.

It is an arithmetic number, because the mean of its divisors is an integer number (28430656044).

Almost surely, 2^56861312087 is an apocalyptic number.

56861312087 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861312087 is an equidigital number, since it uses as much as digits as its factorization.

56861312087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 56861312087 in words is "fifty-six billion, eight hundred sixty-one million, three hundred twelve thousand, eighty-seven".