56861279369 has 2 divisors, whose sum is σ = 56861279370. Its totient is φ = 56861279368.

The previous prime is 56861279287. The next prime is 56861279407. The reversal of 56861279369 is 96397216865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50131210000 + 6730069369 = 223900^2 + 82037^2 .

It is a cyclic number.

It is not a de Polignac number, because 56861279369 - 2⁸ = 56861279113 is a prime.

It is a super-2 number, since 2×56861279369² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56861279269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430639684 + 28430639685.

It is an arithmetic number, because the mean of its divisors is an integer number (28430639685).

Almost surely, 2^56861279369 is an apocalyptic number.

It is an amenable number.

56861279369 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861279369 is an equidigital number, since it uses as much as digits as its factorization.

56861279369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 62.

The spelling of 56861279369 in words is "fifty-six billion, eight hundred sixty-one million, two hundred seventy-nine thousand, three hundred sixty-nine".