25891646752 has 24 divisors (see below), whose sum is σ = 50978709936. Its totient is φ = 12944672832.

The previous prime is 25891646639. The next prime is 25891646771. The reversal of 25891646752 is 25764619852.

It is a junction number, because it is equal to n+sod(n) for n = 25891646693 and 25891646702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417843 + ... + 475789.

It is an arithmetic number, because the mean of its divisors is an integer number (2124112914).

Almost surely, 2^25891646752 is an apocalyptic number.

It is an amenable number.

25891646752 is a deficient number, since it is larger than the sum of its proper divisors (25087063184).

25891646752 is a wasteful number, since it uses less digits than its factorization.

25891646752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71920 (or 71912 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The spelling of 25891646752 in words is "twenty-five billion, eight hundred ninety-one million, six hundred forty-six thousand, seven hundred fifty-two".