25978193012 has 12 divisors (see below), whose sum is σ = 45650477796. Its totient is φ = 12935199360.

The previous prime is 25978192979. The next prime is 25978193041. The reversal of 25978193012 is 21039187952.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17528171236 + 8450021776 = 132394^2 + 91924^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13473203 + ... + 13475130.

It is an arithmetic number, because the mean of its divisors is an integer number (3804206483).

Almost surely, 2^25978193012 is an apocalyptic number.

It is an amenable number.

25978193012 is a deficient number, since it is larger than the sum of its proper divisors (19672284784).

25978193012 is a wasteful number, since it uses less digits than its factorization.

25978193012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26948578 (or 26948576 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 25978193012 in words is "twenty-five billion, nine hundred seventy-eight million, one hundred ninety-three thousand, twelve".