25211422556 has 12 divisors (see below), whose sum is σ = 44129344392. Its totient is φ = 12603038448.

The previous prime is 25211422543. The next prime is 25211422559. The reversal of 25211422556 is 65522411252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25211422559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646910 + ... + 684773.

It is an arithmetic number, because the mean of its divisors is an integer number (3677445366).

Almost surely, 2^25211422556 is an apocalyptic number.

It is an amenable number.

25211422556 is a deficient number, since it is larger than the sum of its proper divisors (18917921836).

25211422556 is a wasteful number, since it uses less digits than its factorization.

25211422556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336420 (or 1336418 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

The spelling of 25211422556 in words is "twenty-five billion, two hundred eleven million, four hundred twenty-two thousand, five hundred fifty-six".