45181632 has 56 divisors (see below), whose sum is σ = 123415552. Its totient is φ = 14572800.

The previous prime is 45181627. The next prime is 45181649. The reversal of 45181632 is 23618154.

It is a self number, because there is not a number n which added to its sum of digits gives 45181632.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2157 + ... + 9747.

Almost surely, 2^45181632 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 45181632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61707776).

45181632 is an abundant number, since it is smaller than the sum of its proper divisors (78233920).

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

45181632 is a wasteful number, since it uses less digits than its factorization.

45181632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7627 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 45181632 is about 6721.7283491673. The cubic root of 45181632 is about 356.1672403633.

Adding to 45181632 its reverse (23618154), we get a palindrome (68799786).

The spelling of 45181632 in words is "forty-five million, one hundred eighty-one thousand, six hundred thirty-two".