44445645 has 32 divisors (see below), whose sum is σ = 80144640. Its totient is φ = 23365440.

The previous prime is 44445631. The next prime is 44445647. The reversal of 44445645 is 54654444.

44445645 is a `hidden beast` number, since 4 + 4 + 4 + 4 + 5 + 645 = 666.

It is not a de Polignac number, because 44445645 - 2⁴ = 44445629 is a prime.

It is a super-3 number, since 3×44445645³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44445647) 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, 7267 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (2504520).

Almost surely, 2^44445645 is an apocalyptic number.

44445645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44445645 is a deficient number, since it is larger than the sum of its proper divisors (35698995).

44445645 is a wasteful number, since it uses less digits than its factorization.

44445645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722 (or 4716 counting only the distinct ones).

The product of its digits is 153600, while the sum is 36.

The square root of 44445645 is about 6666.7567077253. The cubic root of 44445645 is about 354.2227124838. Note that the first 3 decimals are identical.

The spelling of 44445645 in words is "forty-four million, four hundred forty-five thousand, six hundred forty-five".