25386921882 has 64 divisors (see below), whose sum is σ = 68267370240. Its totient is φ = 6826733568.

The previous prime is 25386921821. The next prime is 25386921949. The reversal of 25386921882 is 28812968352.

It is a happy number.

25386921882 is a `hidden beast` number, since 2 + 538 + 6 + 9 + 21 + 8 + 82 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1968903 + ... + 1981754.

It is an arithmetic number, because the mean of its divisors is an integer number (1066677660).

Almost surely, 2^25386921882 is an apocalyptic number.

25386921882 is an abundant number, since it is smaller than the sum of its proper divisors (42880448358).

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

25386921882 is a wasteful number, since it uses less digits than its factorization.

25386921882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950692 (or 3950686 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 25386921882 in words is "twenty-five billion, three hundred eighty-six million, nine hundred twenty-one thousand, eight hundred eighty-two".