25495783680 has 72 divisors (see below), whose sum is σ = 81427171392. Its totient is φ = 6798874624.

The previous prime is 25495783679. The next prime is 25495783699. The reversal of 25495783680 is 8638759452.

It is a self number, because there is not a number n which added to its sum of digits gives 25495783680.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3315924 + ... + 3323603.

It is an arithmetic number, because the mean of its divisors is an integer number (1130932936).

Almost surely, 2^25495783680 is an apocalyptic number.

25495783680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25495783680 is an abundant number, since it is smaller than the sum of its proper divisors (55931387712).

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

25495783680 is an equidigital number, since it uses as much as digits as its factorization.

25495783680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639551 (or 6639537 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 25495783680 in words is "twenty-five billion, four hundred ninety-five million, seven hundred eighty-three thousand, six hundred eighty".