25138354888 has 16 divisors (see below), whose sum is σ = 47146032000. Its totient is φ = 12566079696.

The previous prime is 25138354861. The next prime is 25138354897. The reversal of 25138354888 is 88845383152.

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 3 ways as a sum of consecutive naturals, for example, 352548 + ... + 417811.

It is an arithmetic number, because the mean of its divisors is an integer number (2946627000).

Almost surely, 2^25138354888 is an apocalyptic number.

It is an amenable number.

25138354888 is a deficient number, since it is larger than the sum of its proper divisors (22007677112).

25138354888 is a wasteful number, since it uses less digits than its factorization.

25138354888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774444 (or 774440 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 55.

The spelling of 25138354888 in words is "twenty-five billion, one hundred thirty-eight million, three hundred fifty-four thousand, eight hundred eighty-eight".