25155726225 has 48 divisors (see below), whose sum is σ = 47546206848. Its totient is φ = 11496407040.

The previous prime is 25155726203. The next prime is 25155726301. The reversal of 25155726225 is 52262755152.

It is not a de Polignac number, because 25155726225 - 2¹² = 25155722129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3165457 + ... + 3173393.

It is an arithmetic number, because the mean of its divisors is an integer number (990545976).

Almost surely, 2^25155726225 is an apocalyptic number.

25155726225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25155726225 is a deficient number, since it is larger than the sum of its proper divisors (22390480623).

25155726225 is a wasteful number, since it uses less digits than its factorization.

25155726225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13994 (or 13989 counting only the distinct ones).

The product of its digits is 420000, while the sum is 42.

The spelling of 25155726225 in words is "twenty-five billion, one hundred fifty-five million, seven hundred twenty-six thousand, two hundred twenty-five".