25856977601 has 16 divisors (see below), whose sum is σ = 31849837824. Its totient is φ = 20441640384.

The previous prime is 25856977541. The next prime is 25856977607. The reversal of 25856977601 is 10677965852.

It is a cyclic number.

It is not a de Polignac number, because 25856977601 - 2³⁰ = 24783235777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25856977607) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2285 + ... + 227418.

It is an arithmetic number, because the mean of its divisors is an integer number (1990614864).

Almost surely, 2^25856977601 is an apocalyptic number.

It is an amenable number.

25856977601 is a deficient number, since it is larger than the sum of its proper divisors (5992860223).

25856977601 is a wasteful number, since it uses less digits than its factorization.

25856977601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230960.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 25856977601 in words is "twenty-five billion, eight hundred fifty-six million, nine hundred seventy-seven thousand, six hundred one".