25318655450 has 48 divisors (see below), whose sum is σ = 51508417536. Its totient is φ = 9182668800.

The previous prime is 25318655443. The next prime is 25318655471. The reversal of 25318655450 is 5455681352.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150554 + ... + 270746.

It is an arithmetic number, because the mean of its divisors is an integer number (1073092032).

Almost surely, 2^25318655450 is an apocalyptic number.

25318655450 is an abundant number, since it is smaller than the sum of its proper divisors (26189762086).

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

25318655450 is a wasteful number, since it uses less digits than its factorization.

25318655450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120599 (or 120594 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 25318655450 in words is "twenty-five billion, three hundred eighteen million, six hundred fifty-five thousand, four hundred fifty".