25966409572 has 6 divisors (see below), whose sum is σ = 45441216758. Its totient is φ = 12983204784.

The previous prime is 25966409519. The next prime is 25966409597. The reversal of 25966409572 is 27590466952.

It can be written as a sum of positive squares in only one way, i.e., 25454926116 + 511483456 = 159546^2 + 22616^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245801193 + ... + 3245801200.

Almost surely, 2^25966409572 is an apocalyptic number.

It is an amenable number.

25966409572 is a deficient number, since it is larger than the sum of its proper divisors (19474807186).

25966409572 is a wasteful number, since it uses less digits than its factorization.

25966409572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491602397 (or 6491602395 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 25966409572 in words is "twenty-five billion, nine hundred sixty-six million, four hundred nine thousand, five hundred seventy-two".