2045453994 has 12 divisors (see below), whose sum is σ = 4431817026. Its totient is φ = 681817992.

The previous prime is 2045453989. The next prime is 2045454007. The reversal of 2045453994 is 4993545402.

2045453994 is a `hidden beast` number, since 20 + 4 + 5 + 4 + 539 + 94 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1963641969 + 81812025 = 44313^2 + 9045^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56818149 + ... + 56818184.

Almost surely, 2^2045453994 is an apocalyptic number.

2045453994 is an abundant number, since it is smaller than the sum of its proper divisors (2386363032).

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

2045453994 is a wasteful number, since it uses less digits than its factorization.

2045453994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113636341 (or 113636338 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The square root of 2045453994 is about 45226.6955901047. The cubic root of 2045453994 is about 1269.3943821309.

The spelling of 2045453994 in words is "two billion, forty-five million, four hundred fifty-three thousand, nine hundred ninety-four".