25325552920 has 32 divisors (see below), whose sum is σ = 58820641920. Its totient is φ = 9803439360.

The previous prime is 25325552899. The next prime is 25325552927. The reversal of 25325552920 is 2925552352.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25325552927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10210677 + ... + 10213156.

It is an arithmetic number, because the mean of its divisors is an integer number (1838145060).

Almost surely, 2^25325552920 is an apocalyptic number.

25325552920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25325552920 is an abundant number, since it is smaller than the sum of its proper divisors (33495089000).

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

25325552920 is a wasteful number, since it uses less digits than its factorization.

25325552920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20423875 (or 20423871 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 25325552920 in words is "twenty-five billion, three hundred twenty-five million, five hundred fifty-two thousand, nine hundred twenty".