45451989431 has 2 divisors, whose sum is σ = 45451989432. Its totient is φ = 45451989430.

The previous prime is 45451989403. The next prime is 45451989493. The reversal of 45451989431 is 13498915454.

45451989431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45451989431 is a prime.

It is a super-2 number, since 2×45451989431² (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 (45451989931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725994715 + 22725994716.

It is an arithmetic number, because the mean of its divisors is an integer number (22725994716).

Almost surely, 2^45451989431 is an apocalyptic number.

45451989431 is a deficient number, since it is larger than the sum of its proper divisors (1).

45451989431 is an equidigital number, since it uses as much as digits as its factorization.

45451989431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 53.

The spelling of 45451989431 in words is "forty-five billion, four hundred fifty-one million, nine hundred eighty-nine thousand, four hundred thirty-one".