25319074861 has 8 divisors (see below), whose sum is σ = 25755643448. Its totient is φ = 24883200000.

The previous prime is 25319074849. The next prime is 25319074867. The reversal of 25319074861 is 16847091352.

It can be written as a sum of positive squares in 4 ways, for example, as 6166175625 + 19152899236 = 78525^2 + 138394^2 .

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

It is a 8-Lehmer number, since φ(25319074861) divides (25319074861-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 25319074861 - 2²³ = 25310686253 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 (25319074867) 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, 99540 + ... + 246061.

It is an arithmetic number, because the mean of its divisors is an integer number (3219455431).

It is a 2-persistent number, because it is pandigital, and so is 2⋅25319074861 = 50638149722, but 3⋅25319074861 = 75957224583 is not.

Almost surely, 2^25319074861 is an apocalyptic number.

It is an amenable number.

25319074861 is a deficient number, since it is larger than the sum of its proper divisors (436568587).

25319074861 is a wasteful number, since it uses less digits than its factorization.

25319074861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346863.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 25319074861 in words is "twenty-five billion, three hundred nineteen million, seventy-four thousand, eight hundred sixty-one".