56522121637 has 2 divisors, whose sum is σ = 56522121638. Its totient is φ = 56522121636.

The previous prime is 56522121619. The next prime is 56522121661. The reversal of 56522121637 is 73612122565.

56522121637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44274051396 + 12248070241 = 210414^2 + 110671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56522121637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56522121637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56522101637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28261060818 + 28261060819.

It is an arithmetic number, because the mean of its divisors is an integer number (28261060819).

Almost surely, 2^56522121637 is an apocalyptic number.

It is an amenable number.

56522121637 is a deficient number, since it is larger than the sum of its proper divisors (1).

56522121637 is an equidigital number, since it uses as much as digits as its factorization.

56522121637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The spelling of 56522121637 in words is "fifty-six billion, five hundred twenty-two million, one hundred twenty-one thousand, six hundred thirty-seven".