25449658782 has 16 divisors (see below), whose sum is σ = 51061938960. Its totient is φ = 8456116032.

The previous prime is 25449658777. The next prime is 25449658783. The reversal of 25449658782 is 28785694452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25449658783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6773857 + ... + 6777612.

It is an arithmetic number, because the mean of its divisors is an integer number (3191371185).

Almost surely, 2^25449658782 is an apocalyptic number.

25449658782 is an abundant number, since it is smaller than the sum of its proper divisors (25612280178).

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

25449658782 is a wasteful number, since it uses less digits than its factorization.

25449658782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13551787.

The product of its digits is 38707200, while the sum is 60.

The spelling of 25449658782 in words is "twenty-five billion, four hundred forty-nine million, six hundred fifty-eight thousand, seven hundred eighty-two".