56556725087 has 2 divisors, whose sum is σ = 56556725088. Its totient is φ = 56556725086.

The previous prime is 56556725051. The next prime is 56556725089. The reversal of 56556725087 is 78052765565.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56556725087 - 2⁸ = 56556724831 is a prime.

Together with 56556725089, 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 (56556725089) 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, 28278362543 + 28278362544.

It is an arithmetic number, because the mean of its divisors is an integer number (28278362544).

Almost surely, 2^56556725087 is an apocalyptic number.

56556725087 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556725087 is an equidigital number, since it uses as much as digits as its factorization.

56556725087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640000, while the sum is 56.

The spelling of 56556725087 in words is "fifty-six billion, five hundred fifty-six million, seven hundred twenty-five thousand, eighty-seven".