25850149917 has 8 divisors (see below), whose sum is σ = 34470520224. Its totient is φ = 17231606448.

The previous prime is 25850149879. The next prime is 25850149931. The reversal of 25850149917 is 71994105852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25850149917 - 2²² = 25845955613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25850149917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25850149517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423343 + ... + 480540.

It is an arithmetic number, because the mean of its divisors is an integer number (4308815028).

Almost surely, 2^25850149917 is an apocalyptic number.

It is an amenable number.

25850149917 is a deficient number, since it is larger than the sum of its proper divisors (8620370307).

25850149917 is an equidigital number, since it uses as much as digits as its factorization.

25850149917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913419.

The product of its (nonzero) digits is 907200, while the sum is 51.

The spelling of 25850149917 in words is "twenty-five billion, eight hundred fifty million, one hundred forty-nine thousand, nine hundred seventeen".