25266686401 has 4 divisors (see below), whose sum is σ = 27563657904. Its totient is φ = 22969714900.

The previous prime is 25266686383. The next prime is 25266686453. The reversal of 25266686401 is 10468666252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25266686401 - 2¹¹ = 25266684353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25266686461) 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 3 ways as a sum of consecutive naturals, for example, 1148485735 + ... + 1148485756.

It is an arithmetic number, because the mean of its divisors is an integer number (6890914476).

Almost surely, 2^25266686401 is an apocalyptic number.

It is an amenable number.

25266686401 is a deficient number, since it is larger than the sum of its proper divisors (2296971503).

25266686401 is a wasteful number, since it uses less digits than its factorization.

25266686401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296971502.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 25266686401 in words is "twenty-five billion, two hundred sixty-six million, six hundred eighty-six thousand, four hundred one".