25422402544 has 80 divisors (see below), whose sum is σ = 61732048896. Its totient is φ = 9852883200.

The previous prime is 25422402521. The next prime is 25422402583. The reversal of 25422402544 is 44520422452.

It is a happy number.

It is a super-2 number, since 2×25422402544² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181294 + ... + 289330.

Almost surely, 2^25422402544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25422402544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30866024448).

25422402544 is an abundant number, since it is smaller than the sum of its proper divisors (36309646352).

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

25422402544 is a wasteful number, since it uses less digits than its factorization.

25422402544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108254 (or 108248 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 34.

Adding to 25422402544 its reverse (44520422452), we get a palindrome (69942824996).

The spelling of 25422402544 in words is "twenty-five billion, four hundred twenty-two million, four hundred two thousand, five hundred forty-four".