45187945691 has 16 divisors (see below), whose sum is σ = 52818754560. Its totient is φ = 37853377920.

The previous prime is 45187945687. The next prime is 45187945709. The reversal of 45187945691 is 19654978154.

45187945691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 45187945691 - 2² = 45187945687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45187945691.

It is not an unprimeable number, because it can be changed into a prime (45187945991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127955 + ... + 326723.

It is an arithmetic number, because the mean of its divisors is an integer number (3301172160).

Almost surely, 2^45187945691 is an apocalyptic number.

45187945691 is a deficient number, since it is larger than the sum of its proper divisors (7630808869).

45187945691 is a wasteful number, since it uses less digits than its factorization.

45187945691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199514.

The product of its digits is 10886400, while the sum is 59.

The spelling of 45187945691 in words is "forty-five billion, one hundred eighty-seven million, nine hundred forty-five thousand, six hundred ninety-one".