45005649 has 32 divisors (see below), whose sum is σ = 67651584. Its totient is φ = 26429760.

The previous prime is 45005621. The next prime is 45005669. The reversal of 45005649 is 94650054.

It is not a de Polignac number, because 45005649 - 2⁸ = 45005393 is a prime.

It is a super-2 number, since 2×45005649² = 4051016883822402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45005669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78534 + ... + 79104.

It is an arithmetic number, because the mean of its divisors is an integer number (2114112).

Almost surely, 2^45005649 is an apocalyptic number.

It is an amenable number.

45005649 is a deficient number, since it is larger than the sum of its proper divisors (22645935).

45005649 is a wasteful number, since it uses less digits than its factorization.

45005649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 45005649 is about 6708.6249708864. The cubic root of 45005649 is about 355.7042134487.

It can be divided in two parts, 45005 and 649, that added together give a palindrome (45654).

The spelling of 45005649 in words is "forty-five million, five thousand, six hundred forty-nine".