45037977661 has 2 divisors, whose sum is σ = 45037977662. Its totient is φ = 45037977660.

The previous prime is 45037977557. The next prime is 45037977697. The reversal of 45037977661 is 16677973054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22838765625 + 22199212036 = 151125^2 + 148994^2 .

It is a cyclic number.

It is not a de Polignac number, because 45037977661 - 2²⁵ = 45004423229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45037977161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22518988830 + 22518988831.

It is an arithmetic number, because the mean of its divisors is an integer number (22518988831).

Almost surely, 2^45037977661 is an apocalyptic number.

It is an amenable number.

45037977661 is a deficient number, since it is larger than the sum of its proper divisors (1).

45037977661 is an equidigital number, since it uses as much as digits as its factorization.

45037977661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6667920, while the sum is 55.

The spelling of 45037977661 in words is "forty-five billion, thirty-seven million, nine hundred seventy-seven thousand, six hundred sixty-one".