2556236625 has 16 divisors (see below), whose sum is σ = 4253578368. Its totient is φ = 1363326000.

The previous prime is 2556236621. The next prime is 2556236633. The reversal of 2556236625 is 5266326552.

It is not a de Polignac number, because 2556236625 - 2² = 2556236621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556236621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3407941 + ... + 3408690.

It is an arithmetic number, because the mean of its divisors is an integer number (265848648).

Almost surely, 2^2556236625 is an apocalyptic number.

2556236625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2556236625 is a deficient number, since it is larger than the sum of its proper divisors (1697341743).

2556236625 is an equidigital number, since it uses as much as digits as its factorization.

2556236625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816649 (or 6816639 counting only the distinct ones).

The product of its digits is 648000, while the sum is 42.

The square root of 2556236625 is about 50559.2387699815. The cubic root of 2556236625 is about 1367.3100868476.

The spelling of 2556236625 in words is "two billion, five hundred fifty-six million, two hundred thirty-six thousand, six hundred twenty-five".