25426490780 has 24 divisors (see below), whose sum is σ = 55118071680. Its totient is φ = 9842512320.

The previous prime is 25426490779. The next prime is 25426490801. The reversal of 25426490780 is 8709462452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20504615 + ... + 20505854.

It is an arithmetic number, because the mean of its divisors is an integer number (2296586320).

Almost surely, 2^25426490780 is an apocalyptic number.

25426490780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25426490780 is an abundant number, since it is smaller than the sum of its proper divisors (29691580900).

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

25426490780 is a wasteful number, since it uses less digits than its factorization.

25426490780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41010509 (or 41010507 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 25426490780 in words is "twenty-five billion, four hundred twenty-six million, four hundred ninety thousand, seven hundred eighty".