25660272455812 has 12 divisors (see below), whose sum is σ = 45080206281180. Its totient is φ = 12780213518336.

The previous prime is 25660272455767. The next prime is 25660272455833. The reversal of 25660272455812 is 21855427206652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17684934979716 + 7975337476096 = 4205346^2 + 2824064^2 .

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, 12480676237 + ... + 12480678292.

It is an arithmetic number, because the mean of its divisors is an integer number (3756683856765).

Almost surely, 2^{25660272455812} is an apocalyptic number.

It is an amenable number.

25660272455812 is a deficient number, since it is larger than the sum of its proper divisors (19419933825368).

25660272455812 is a wasteful number, since it uses less digits than its factorization.

25660272455812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24961354790 (or 24961354788 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 55.

The spelling of 25660272455812 in words is "twenty-five trillion, six hundred sixty billion, two hundred seventy-two million, four hundred fifty-five thousand, eight hundred twelve".