45644013 has 8 divisors (see below), whose sum is σ = 67620800. Its totient is φ = 30429324.

The previous prime is 45644009. The next prime is 45644041. The reversal of 45644013 is 31044654.

45644013 is a `hidden beast` number, since 4 + 5 + 644 + 0 + 13 = 666.

It is not a de Polignac number, because 45644013 - 2² = 45644009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1690519 = 45644013 / (4 + 5 + 6 + 4 + 4 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45644083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 845233 + ... + 845286.

It is an arithmetic number, because the mean of its divisors is an integer number (8452600).

Almost surely, 2^45644013 is an apocalyptic number.

It is an amenable number.

45644013 is a deficient number, since it is larger than the sum of its proper divisors (21976787).

45644013 is a wasteful number, since it uses less digits than its factorization.

45644013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690528 (or 1690522 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 45644013 is about 6756.0353018616. The cubic root of 45644013 is about 357.3781037465.

Adding to 45644013 its reverse (31044654), we get a palindrome (76688667).

The spelling of 45644013 in words is "forty-five million, six hundred forty-four thousand, thirteen".