56689926949 has 2 divisors, whose sum is σ = 56689926950. Its totient is φ = 56689926948.

The previous prime is 56689926901. The next prime is 56689927031. The reversal of 56689926949 is 94962998665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31145896324 + 25544030625 = 176482^2 + 159825^2 .

It is a cyclic number.

It is not a de Polignac number, because 56689926949 - 2³¹ = 54542443301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56689926149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28344963474 + 28344963475.

It is an arithmetic number, because the mean of its divisors is an integer number (28344963475).

Almost surely, 2^56689926949 is an apocalyptic number.

It is an amenable number.

56689926949 is a deficient number, since it is larger than the sum of its proper divisors (1).

56689926949 is an equidigital number, since it uses as much as digits as its factorization.

56689926949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453496320, while the sum is 73.

The spelling of 56689926949 in words is "fifty-six billion, six hundred eighty-nine million, nine hundred twenty-six thousand, nine hundred forty-nine".