56891874461 has 2 divisors, whose sum is σ = 56891874462. Its totient is φ = 56891874460.

The previous prime is 56891874451. The next prime is 56891874463. The reversal of 56891874461 is 16447819865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30194275225 + 26697599236 = 173765^2 + 163394^2 .

It is a cyclic number.

It is not a de Polignac number, because 56891874461 - 2⁶ = 56891874397 is a prime.

Together with 56891874463, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56891874461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56891874463) 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, 28445937230 + 28445937231.

It is an arithmetic number, because the mean of its divisors is an integer number (28445937231).

Almost surely, 2^56891874461 is an apocalyptic number.

It is an amenable number.

56891874461 is a deficient number, since it is larger than the sum of its proper divisors (1).

56891874461 is an equidigital number, since it uses as much as digits as its factorization.

56891874461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 59.

The spelling of 56891874461 in words is "fifty-six billion, eight hundred ninety-one million, eight hundred seventy-four thousand, four hundred sixty-one".