25125984640 has 32 divisors (see below), whose sum is σ = 60066808560. Its totient is φ = 10050393600.

The previous prime is 25125984601. The next prime is 25125984641. The reversal of 25125984640 is 4648952152.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25125984641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19629036 + ... + 19630315.

Almost surely, 2^25125984640 is an apocalyptic number.

25125984640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25125984640 is an abundant number, since it is smaller than the sum of its proper divisors (34940823920).

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

25125984640 is an equidigital number, since it uses as much as digits as its factorization.

25125984640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39259370 (or 39259358 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 25125984640 in words is "twenty-five billion, one hundred twenty-five million, nine hundred eighty-four thousand, six hundred forty".