45557913581 has 2 divisors, whose sum is σ = 45557913582. Its totient is φ = 45557913580.

The previous prime is 45557913571. The next prime is 45557913589. The reversal of 45557913581 is 18531975554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41083641481 + 4474272100 = 202691^2 + 66890^2 .

It is a cyclic number.

It is not a de Polignac number, because 45557913581 - 2⁶ = 45557913517 is a prime.

It is a super-2 number, since 2×45557913581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45557913589) 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, 22778956790 + 22778956791.

It is an arithmetic number, because the mean of its divisors is an integer number (22778956791).

Almost surely, 2^45557913581 is an apocalyptic number.

It is an amenable number.

45557913581 is a deficient number, since it is larger than the sum of its proper divisors (1).

45557913581 is an equidigital number, since it uses as much as digits as its factorization.

45557913581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780000, while the sum is 53.

The spelling of 45557913581 in words is "forty-five billion, five hundred fifty-seven million, nine hundred thirteen thousand, five hundred eighty-one".