25793279785 has 48 divisors (see below), whose sum is σ = 39720884112. Its totient is φ = 15928012800.

The previous prime is 25793279719. The next prime is 25793279803. The reversal of 25793279785 is 58797239752.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12414193561 + 13379086224 = 111419^2 + 115668^2 .

It is not a de Polignac number, because 25793279785 - 2¹⁵ = 25793247017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31825 + ... + 229345.

It is an arithmetic number, because the mean of its divisors is an integer number (827518419).

Almost surely, 2^25793279785 is an apocalyptic number.

It is an amenable number.

25793279785 is a deficient number, since it is larger than the sum of its proper divisors (13927604327).

25793279785 is a wasteful number, since it uses less digits than its factorization.

25793279785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197594 (or 197587 counting only the distinct ones).

The product of its digits is 66679200, while the sum is 64.

The spelling of 25793279785 in words is "twenty-five billion, seven hundred ninety-three million, two hundred seventy-nine thousand, seven hundred eighty-five".