45220469378 has 18 divisors (see below), whose sum is σ = 78908778153. Its totient is φ = 19379298960.

The previous prime is 45220469369. The next prime is 45220469401. The reversal of 45220469378 is 87396402254.

It can be written as a sum of positive squares in 2 ways, for example, as 42818783329 + 2401686049 = 206927^2 + 49007^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=150367.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2094398 + ... + 2115878.

Almost surely, 2^45220469378 is an apocalyptic number.

45220469378 is a deficient number, since it is larger than the sum of its proper divisors (33688308775).

45220469378 is an frugal number, since it uses more digits than its factorization.

45220469378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42978 (or 21490 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

Multiplying 45220469378 by its sum of digits (50), we get a square (2261023468900 = 1503670²).

The spelling of 45220469378 in words is "forty-five billion, two hundred twenty million, four hundred sixty-nine thousand, three hundred seventy-eight".