45044456021 has 2 divisors, whose sum is σ = 45044456022. Its totient is φ = 45044456020.

The previous prime is 45044455997. The next prime is 45044456033. The reversal of 45044456021 is 12065444054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35423004100 + 9621451921 = 188210^2 + 98089^2 .

It is a cyclic number.

It is not a de Polignac number, because 45044456021 - 2¹⁸ = 45044193877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45044456071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22522228010 + 22522228011.

It is an arithmetic number, because the mean of its divisors is an integer number (22522228011).

Almost surely, 2^45044456021 is an apocalyptic number.

It is an amenable number.

45044456021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45044456021 is an equidigital number, since it uses as much as digits as its factorization.

45044456021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 45044456021 in words is "forty-five billion, forty-four million, four hundred fifty-six thousand, twenty-one".