56997479989 has 2 divisors, whose sum is σ = 56997479990. Its totient is φ = 56997479988.

The previous prime is 56997479953. The next prime is 56997480017. The reversal of 56997479989 is 98997479965.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55021677489 + 1975802500 = 234567^2 + 44450^2 .

It is a cyclic number.

It is not a de Polignac number, because 56997479989 - 2²⁹ = 56460609077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56997479489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28498739994 + 28498739995.

It is an arithmetic number, because the mean of its divisors is an integer number (28498739995).

Almost surely, 2^56997479989 is an apocalyptic number.

It is an amenable number.

56997479989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56997479989 is an equidigital number, since it uses as much as digits as its factorization.

56997479989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2777664960, while the sum is 82.

The spelling of 56997479989 in words is "fifty-six billion, nine hundred ninety-seven million, four hundred seventy-nine thousand, nine hundred eighty-nine".