45816891 has 4 divisors (see below), whose sum is σ = 61089192. Its totient is φ = 30544592.

The previous prime is 45816877. The next prime is 45816899. The reversal of 45816891 is 19861854.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45816891 - 2¹⁷ = 45685819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45816899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7636146 + ... + 7636151.

It is an arithmetic number, because the mean of its divisors is an integer number (15272298).

Almost surely, 2^45816891 is an apocalyptic number.

45816891 is a deficient number, since it is larger than the sum of its proper divisors (15272301).

45816891 is a wasteful number, since it uses less digits than its factorization.

45816891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15272300.

The product of its digits is 69120, while the sum is 42.

The square root of 45816891 is about 6768.8175481394. The cubic root of 45816891 is about 357.8287285572.

The spelling of 45816891 in words is "forty-five million, eight hundred sixteen thousand, eight hundred ninety-one".