25122643242 has 16 divisors (see below), whose sum is σ = 50742765792. Its totient is φ = 8291301200.

The previous prime is 25122643219. The next prime is 25122643289. The reversal of 25122643242 is 24234622152.

It is a super-2 number, since 2×25122643242² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 20727648 + ... + 20728859.

It is an arithmetic number, because the mean of its divisors is an integer number (3171422862).

Almost surely, 2^25122643242 is an apocalyptic number.

25122643242 is an abundant number, since it is smaller than the sum of its proper divisors (25620122550).

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

25122643242 is a wasteful number, since it uses less digits than its factorization.

25122643242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41456613.

The product of its digits is 46080, while the sum is 33.

The spelling of 25122643242 in words is "twenty-five billion, one hundred twenty-two million, six hundred forty-three thousand, two hundred forty-two".