45018081 has 12 divisors (see below), whose sum is σ = 65093652. Its totient is φ = 29980896.

The previous prime is 45018079. The next prime is 45018089. The reversal of 45018081 is 18081054.

45018081 is a `hidden beast` number, since 4 + 501 + 80 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33177600 + 11840481 = 5760^2 + 3441^2 .

It is not a de Polignac number, because 45018081 - 2¹ = 45018079 is a prime.

It is a super-2 number, since 2×45018081² = 4053255233845122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45018089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9535 + ... + 13451.

It is an arithmetic number, because the mean of its divisors is an integer number (5424471).

Almost surely, 2^45018081 is an apocalyptic number.

It is an amenable number.

45018081 is a deficient number, since it is larger than the sum of its proper divisors (20075571).

45018081 is a wasteful number, since it uses less digits than its factorization.

45018081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200 (or 5197 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 45018081 is about 6709.5514753223. The cubic root of 45018081 is about 355.7369627277.

The spelling of 45018081 in words is "forty-five million, eighteen thousand, eighty-one".