25890869117 has 4 divisors (see below), whose sum is σ = 27413861436. Its totient is φ = 24367876800.

The previous prime is 25890869111. The next prime is 25890869129. The reversal of 25890869117 is 71196809852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24006093721 + 1884775396 = 154939^2 + 43414^2 .

It is a cyclic number.

It is not a de Polignac number, because 25890869117 - 2¹⁰ = 25890868093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890869111) 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, 761496134 + ... + 761496167.

It is an arithmetic number, because the mean of its divisors is an integer number (6853465359).

Almost surely, 2^25890869117 is an apocalyptic number.

It is an amenable number.

25890869117 is a deficient number, since it is larger than the sum of its proper divisors (1522992319).

25890869117 is a wasteful number, since it uses less digits than its factorization.

25890869117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522992318.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 25890869117 in words is "twenty-five billion, eight hundred ninety million, eight hundred sixty-nine thousand, one hundred seventeen".