45019813873 has 2 divisors, whose sum is σ = 45019813874. Its totient is φ = 45019813872.

The previous prime is 45019813859. The next prime is 45019813877. The reversal of 45019813873 is 37831891054.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31289364544 + 13730449329 = 176888^2 + 117177^2 .

It is a cyclic number.

It is not a de Polignac number, because 45019813873 - 2²¹ = 45017716721 is a prime.

It is not a weakly prime, because it can be changed into another prime (45019813877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22509906936 + 22509906937.

It is an arithmetic number, because the mean of its divisors is an integer number (22509906937).

Almost surely, 2^45019813873 is an apocalyptic number.

It is an amenable number.

45019813873 is a deficient number, since it is larger than the sum of its proper divisors (1).

45019813873 is an equidigital number, since it uses as much as digits as its factorization.

45019813873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 45019813873 in words is "forty-five billion, nineteen million, eight hundred thirteen thousand, eight hundred seventy-three".