45509812 has 6 divisors (see below), whose sum is σ = 79642178. Its totient is φ = 22754904.

The previous prime is 45509803. The next prime is 45509869. The reversal of 45509812 is 21890554.

It can be written as a sum of positive squares in only one way, i.e., 45508516 + 1296 = 6746^2 + 36^2 .

It is a super-2 number, since 2×45509812² = 4142285976550688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5688723 + ... + 5688730.

Almost surely, 2^45509812 is an apocalyptic number.

It is an amenable number.

45509812 is a deficient number, since it is larger than the sum of its proper divisors (34132366).

45509812 is a wasteful number, since it uses less digits than its factorization.

45509812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11377457 (or 11377455 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 45509812 is about 6746.0960562387. The cubic root of 45509812 is about 357.0275095384.

The spelling of 45509812 in words is "forty-five million, five hundred nine thousand, eight hundred twelve".