45644491 has 4 divisors (see below), whose sum is σ = 46269832. Its totient is φ = 45019152.

The previous prime is 45644483. The next prime is 45644497. The reversal of 45644491 is 19444654.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45644491 - 2³ = 45644483 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 45644491.

It is not an unprimeable number, because it can be changed into a prime (45644497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312561 + ... + 312706.

It is an arithmetic number, because the mean of its divisors is an integer number (11567458).

Almost surely, 2^45644491 is an apocalyptic number.

45644491 is a deficient number, since it is larger than the sum of its proper divisors (625341).

45644491 is an equidigital number, since it uses as much as digits as its factorization.

45644491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625340.

The product of its digits is 69120, while the sum is 37.

The square root of 45644491 is about 6756.0706775462. The cubic root of 45644491 is about 357.3793512715.

The spelling of 45644491 in words is "forty-five million, six hundred forty-four thousand, four hundred ninety-one".