45202521509 has 2 divisors, whose sum is σ = 45202521510. Its totient is φ = 45202521508.

The previous prime is 45202521449. The next prime is 45202521517. The reversal of 45202521509 is 90512520254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30702749284 + 14499772225 = 175222^2 + 120415^2 .

It is a cyclic number.

It is not a de Polignac number, because 45202521509 - 2²⁴ = 45185744293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45202521409) 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, 22601260754 + 22601260755.

It is an arithmetic number, because the mean of its divisors is an integer number (22601260755).

Almost surely, 2^45202521509 is an apocalyptic number.

It is an amenable number.

45202521509 is a deficient number, since it is larger than the sum of its proper divisors (1).

45202521509 is an equidigital number, since it uses as much as digits as its factorization.

45202521509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 45202521509 in words is "forty-five billion, two hundred two million, five hundred twenty-one thousand, five hundred nine".