25726640768 has 32 divisors (see below), whose sum is σ = 51395148000. Its totient is φ = 12827466496.

The previous prime is 25726640767. The next prime is 25726640791. The reversal of 25726640768 is 86704662752.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (25726640761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233978 + ... + 325881.

It is an arithmetic number, because the mean of its divisors is an integer number (1606098375).

Almost surely, 2^25726640768 is an apocalyptic number.

It is an amenable number.

25726640768 is a deficient number, since it is larger than the sum of its proper divisors (25668507232).

25726640768 is an equidigital number, since it uses as much as digits as its factorization.

25726640768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560232 (or 560220 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 25726640768 in words is "twenty-five billion, seven hundred twenty-six million, six hundred forty thousand, seven hundred sixty-eight".