45491613991 has 2 divisors, whose sum is σ = 45491613992. Its totient is φ = 45491613990.

The previous prime is 45491613983. The next prime is 45491614019. The reversal of 45491613991 is 19931619454.

45491613991 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 not a de Polignac number, because 45491613991 - 2³ = 45491613983 is a prime.

It is a super-2 number, since 2×45491613991² (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 (45491613901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22745806995 + 22745806996.

It is an arithmetic number, because the mean of its divisors is an integer number (22745806996).

Almost surely, 2^45491613991 is an apocalyptic number.

45491613991 is a deficient number, since it is larger than the sum of its proper divisors (1).

45491613991 is an equidigital number, since it uses as much as digits as its factorization.

45491613991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 52.

The spelling of 45491613991 in words is "forty-five billion, four hundred ninety-one million, six hundred thirteen thousand, nine hundred ninety-one".