45661720 has 32 divisors (see below), whose sum is σ = 110643120. Its totient is φ = 16859520.

The previous prime is 45661691. The next prime is 45661751. The reversal of 45661720 is 2716654.

It is a happy number.

45661720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43386 + ... + 44425.

Almost surely, 2^45661720 is an apocalyptic number.

45661720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45661720 is an abundant number, since it is smaller than the sum of its proper divisors (64981400).

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

45661720 is a wasteful number, since it uses less digits than its factorization.

45661720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87835 (or 87831 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 45661720 is about 6757.3456327170. The cubic root of 45661720 is about 357.4243111645.

The spelling of 45661720 in words is "forty-five million, six hundred sixty-one thousand, seven hundred twenty".