45881865 has 48 divisors (see below), whose sum is σ = 84689280. Its totient is φ = 22913280.

The previous prime is 45881863. The next prime is 45881867. The reversal of 45881865 is 56818854.

45881865 is a `hidden beast` number, since 4 + 588 + 1 + 8 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (45881863) and next prime (45881867).

It is not a de Polignac number, because 45881865 - 2¹ = 45881863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 45881865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45881863) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 87805 + ... + 88325.

It is an arithmetic number, because the mean of its divisors is an integer number (1764360).

Almost surely, 2^45881865 is an apocalyptic number.

45881865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

45881865 is a deficient number, since it is larger than the sum of its proper divisors (38807415).

45881865 is a wasteful number, since it uses less digits than its factorization.

45881865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 45881865 is about 6773.6153566615. The cubic root of 45881865 is about 357.9977970798.

The spelling of 45881865 in words is "forty-five million, eight hundred eighty-one thousand, eight hundred sixty-five".