45521644 has 48 divisors (see below), whose sum is σ = 98219520. Its totient is φ = 18023040.

The previous prime is 45521633. The next prime is 45521657. The reversal of 45521644 is 44612554.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20769 + ... + 22855.

It is an arithmetic number, because the mean of its divisors is an integer number (2046240).

Almost surely, 2^45521644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45521644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49109760).

45521644 is an abundant number, since it is smaller than the sum of its proper divisors (52697876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45521644 is a wasteful number, since it uses less digits than its factorization.

45521644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2156 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 45521644 is about 6746.9729508869. The cubic root of 45521644 is about 357.0584478003.

The spelling of 45521644 in words is "forty-five million, five hundred twenty-one thousand, six hundred forty-four".