25225421155 has 48 divisors (see below), whose sum is σ = 35241212160. Its totient is φ = 17272284480.

The previous prime is 25225421107. The next prime is 25225421167. The reversal of 25225421155 is 55112452252.

It is not a de Polignac number, because 25225421155 - 2²⁷ = 25091203427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25225421155.

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, 1866954 + ... + 1880416.

It is an arithmetic number, because the mean of its divisors is an integer number (734191920).

Almost surely, 2^25225421155 is an apocalyptic number.

25225421155 is a deficient number, since it is larger than the sum of its proper divisors (10015791005).

25225421155 is a wasteful number, since it uses less digits than its factorization.

25225421155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13672 (or 13661 counting only the distinct ones).

The product of its digits is 40000, while the sum is 34.

The spelling of 25225421155 in words is "twenty-five billion, two hundred twenty-five million, four hundred twenty-one thousand, one hundred fifty-five".