2543979625 has 24 divisors (see below), whose sum is σ = 3489772104. Its totient is φ = 1850156000.

The previous prime is 2543979601. The next prime is 2543979643. The reversal of 2543979625 is 5269793452.

It can be written as a sum of positive squares in 4 ways, for example, as 2509056 + 2541470569 = 1584^2 + 50413^2 .

It is not a de Polignac number, because 2543979625 - 2⁷ = 2543979497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68974 + ... + 99223.

It is an arithmetic number, because the mean of its divisors is an integer number (145407171).

Almost surely, 2^2543979625 is an apocalyptic number.

2543979625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2543979625 is a deficient number, since it is larger than the sum of its proper divisors (945792479).

2543979625 is a wasteful number, since it uses less digits than its factorization.

2543979625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168234 (or 168213 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 52.

The square root of 2543979625 is about 50437.8788709438. The cubic root of 2543979625 is about 1365.1211948548.

The spelling of 2543979625 in words is "two billion, five hundred forty-three million, nine hundred seventy-nine thousand, six hundred twenty-five".