25551442422 has 24 divisors (see below), whose sum is σ = 60394318920. Its totient is φ = 7742861280.

The previous prime is 25551442381. The next prime is 25551442513. The reversal of 25551442422 is 22424415552.

25551442422 is a `hidden beast` number, since 25 + 551 + 4 + 42 + 42 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64523647 + ... + 64524042.

It is an arithmetic number, because the mean of its divisors is an integer number (2516429955).

Almost surely, 2^25551442422 is an apocalyptic number.

25551442422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25551442422 is an abundant number, since it is smaller than the sum of its proper divisors (34842876498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25551442422 is a wasteful number, since it uses less digits than its factorization.

25551442422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129047708 (or 129047705 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

Adding to 25551442422 its reverse (22424415552), we get a palindrome (47975857974).

The spelling of 25551442422 in words is "twenty-five billion, five hundred fifty-one million, four hundred forty-two thousand, four hundred twenty-two".