25856457801 has 16 divisors (see below), whose sum is σ = 34613828928. Its totient is φ = 17168414400.

The previous prime is 25856457787. The next prime is 25856457817. The reversal of 25856457801 is 10875465852.

It is not a de Polignac number, because 25856457801 - 2⁵ = 25856457769 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25856457881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2763391 + ... + 2772731.

It is an arithmetic number, because the mean of its divisors is an integer number (2163364308).

Almost surely, 2^25856457801 is an apocalyptic number.

It is an amenable number.

25856457801 is a deficient number, since it is larger than the sum of its proper divisors (8757371127).

25856457801 is a wasteful number, since it uses less digits than its factorization.

25856457801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12952.

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 25856457801 in words is "twenty-five billion, eight hundred fifty-six million, four hundred fifty-seven thousand, eight hundred one".