25403843680 has 24 divisors (see below), whose sum is σ = 60016581072. Its totient is φ = 10161537408.

The previous prime is 25403843659. The next prime is 25403843681. The reversal of 25403843680 is 8634830452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25403843681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79386852 + ... + 79387171.

It is an arithmetic number, because the mean of its divisors is an integer number (2500690878).

Almost surely, 2^25403843680 is an apocalyptic number.

25403843680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25403843680 is an abundant number, since it is smaller than the sum of its proper divisors (34612737392).

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

25403843680 is a wasteful number, since it uses less digits than its factorization.

25403843680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158774038 (or 158774030 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 25403843680 in words is "twenty-five billion, four hundred three million, eight hundred forty-three thousand, six hundred eighty".