45721616 has 20 divisors (see below), whose sum is σ = 90258732. Its totient is φ = 22429056.

The previous prime is 45721583. The next prime is 45721639. The reversal of 45721616 is 61612754.

It can be written as a sum of positive squares in 2 ways, for example, as 16777216 + 28944400 = 4096^2 + 5380^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26111 + ... + 27806.

Almost surely, 2^45721616 is an apocalyptic number.

It is an amenable number.

45721616 is a deficient number, since it is larger than the sum of its proper divisors (44537116).

45721616 is a wasteful number, since it uses less digits than its factorization.

45721616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53978 (or 53972 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 45721616 is about 6761.7760980381. The cubic root of 45721616 is about 357.5805246748.

The spelling of 45721616 in words is "forty-five million, seven hundred twenty-one thousand, six hundred sixteen".