45131778 has 24 divisors (see below), whose sum is σ = 98221500. Its totient is φ = 14976864.

The previous prime is 45131767. The next prime is 45131813. The reversal of 45131778 is 87713154.

It can be written as a sum of positive squares in 2 ways, for example, as 45118089 + 13689 = 6717^2 + 117^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1353 + ... + 9596.

Almost surely, 2^45131778 is an apocalyptic number.

45131778 is an abundant number, since it is smaller than the sum of its proper divisors (53089722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45131778 is a wasteful number, since it uses less digits than its factorization.

45131778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186 (or 11183 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 45131778 is about 6718.0189044092. The cubic root of 45131778 is about 356.0361922974.

The spelling of 45131778 in words is "forty-five million, one hundred thirty-one thousand, seven hundred seventy-eight".