2545809994 has 48 divisors (see below), whose sum is σ = 4805504928. Its totient is φ = 1002583008.

The previous prime is 2545809991. The next prime is 2545810031. The reversal of 2545809994 is 4999085452.

It is a super-2 number, since 2×2545809994² = 12962297051100560072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2545809991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284797 + ... + 293599.

It is an arithmetic number, because the mean of its divisors is an integer number (100114686).

Almost surely, 2^2545809994 is an apocalyptic number.

2545809994 is a deficient number, since it is larger than the sum of its proper divisors (2259694934).

2545809994 is a wasteful number, since it uses less digits than its factorization.

2545809994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9059 (or 9052 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The square root of 2545809994 is about 50456.0203940025. The cubic root of 2545809994 is about 1365.4485135793.

The spelling of 2545809994 in words is "two billion, five hundred forty-five million, eight hundred nine thousand, nine hundred ninety-four".