45156978 has 24 divisors (see below), whose sum is σ = 98034300. Its totient is φ = 15022464.

The previous prime is 45156961. The next prime is 45157033. The reversal of 45156978 is 87965154.

45156978 is a `hidden beast` number, since 4 + 515 + 69 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37051569 + 8105409 = 6087^2 + 2847^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8038 + ... + 12446.

Almost surely, 2^45156978 is an apocalyptic number.

45156978 is an abundant number, since it is smaller than the sum of its proper divisors (52877322).

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

45156978 is a wasteful number, since it uses less digits than its factorization.

45156978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986 (or 4983 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 45156978 is about 6719.8941955956. The cubic root of 45156978 is about 356.1024460034.

The spelling of 45156978 in words is "forty-five million, one hundred fifty-six thousand, nine hundred seventy-eight".