25554401320 has 32 divisors (see below), whose sum is σ = 65711318400. Its totient is φ = 8761508928.

The previous prime is 25554401317. The next prime is 25554401339. The reversal of 25554401320 is 2310445552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45632580 + ... + 45633139.

It is an arithmetic number, because the mean of its divisors is an integer number (2053478700).

Almost surely, 2^25554401320 is an apocalyptic number.

25554401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25554401320 is an abundant number, since it is smaller than the sum of its proper divisors (40156917080).

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

25554401320 is a wasteful number, since it uses less digits than its factorization.

25554401320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91265737 (or 91265733 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 25554401320 its reverse (2310445552), we get a palindrome (27864846872).

The spelling of 25554401320 in words is "twenty-five billion, five hundred fifty-four million, four hundred one thousand, three hundred twenty".