25908827971 has 4 divisors (see below), whose sum is σ = 27901814752. Its totient is φ = 23915841192.

The previous prime is 25908827929. The next prime is 25908827981. The reversal of 25908827971 is 17972880952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25908827971 - 2⁷ = 25908827843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25908827981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996493371 + ... + 996493396.

It is an arithmetic number, because the mean of its divisors is an integer number (6975453688).

Almost surely, 2^25908827971 is an apocalyptic number.

25908827971 is a deficient number, since it is larger than the sum of its proper divisors (1992986781).

25908827971 is a wasteful number, since it uses less digits than its factorization.

25908827971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992986780.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 25908827971 in words is "twenty-five billion, nine hundred eight million, eight hundred twenty-seven thousand, nine hundred seventy-one".