25869771117 has 32 divisors (see below), whose sum is σ = 40395283200. Its totient is φ = 16337595456.

The previous prime is 25869771113. The next prime is 25869771127. The reversal of 25869771117 is 71117796852.

It is not a de Polignac number, because 25869771117 - 2² = 25869771113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25869771113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270193 + ... + 353190.

It is an arithmetic number, because the mean of its divisors is an integer number (1262352600).

Almost surely, 2^25869771117 is an apocalyptic number.

25869771117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25869771117 is a deficient number, since it is larger than the sum of its proper divisors (14525512083).

25869771117 is a wasteful number, since it uses less digits than its factorization.

25869771117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623474 (or 623468 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 54.

The spelling of 25869771117 in words is "twenty-five billion, eight hundred sixty-nine million, seven hundred seventy-one thousand, one hundred seventeen".