25978566115 has 8 divisors (see below), whose sum is σ = 31412251728. Its totient is φ = 20624204640.

The previous prime is 25978566071. The next prime is 25978566127. The reversal of 25978566115 is 51166587952.

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

It is not a de Polignac number, because 25978566115 - 2¹³ = 25978557923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19830312 + ... + 19831621.

It is an arithmetic number, because the mean of its divisors is an integer number (3926531466).

Almost surely, 2^25978566115 is an apocalyptic number.

25978566115 is a deficient number, since it is larger than the sum of its proper divisors (5433685613).

25978566115 is a wasteful number, since it uses less digits than its factorization.

25978566115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39662069.

The product of its digits is 4536000, while the sum is 55.

The spelling of 25978566115 in words is "twenty-five billion, nine hundred seventy-eight million, five hundred sixty-six thousand, one hundred fifteen".