25551960 has 128 divisors (see below), whose sum is σ = 92275200. Its totient is φ = 5529600.

The previous prime is 25551959. The next prime is 25551961. The reversal of 25551960 is 6915552.

It is an interprime number because it is at equal distance from previous prime (25551959) and next prime (25551961).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25551961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15160 + ... + 16760.

It is an arithmetic number, because the mean of its divisors is an integer number (720900).

Almost surely, 2^25551960 is an apocalyptic number.

25551960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25551960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46137600).

25551960 is an abundant number, since it is smaller than the sum of its proper divisors (66723240).

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

25551960 is a wasteful number, since it uses less digits than its factorization.

25551960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 25551960 is about 5054.8946576561. The cubic root of 25551960 is about 294.5380493767.

The spelling of 25551960 in words is "twenty-five million, five hundred fifty-one thousand, nine hundred sixty".