25554634140 has 96 divisors (see below), whose sum is σ = 83514783744. Its totient is φ = 5716776960.

The previous prime is 25554634121. The next prime is 25554634241. The reversal of 25554634140 is 4143645552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 627541 + ... + 667020.

It is an arithmetic number, because the mean of its divisors is an integer number (869945664).

Almost surely, 2^25554634140 is an apocalyptic number.

25554634140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25554634140 is an abundant number, since it is smaller than the sum of its proper divisors (57960149604).

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

25554634140 is a wasteful number, since it uses less digits than its factorization.

25554634140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294627 (or 1294625 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 25554634140 in words is "twenty-five billion, five hundred fifty-four million, six hundred thirty-four thousand, one hundred forty".