25262566401 has 8 divisors (see below), whose sum is σ = 33686481280. Its totient is φ = 16840181232.

The previous prime is 25262566393. The next prime is 25262566409. The reversal of 25262566401 is 10466526252.

It is an interprime number because it is at equal distance from previous prime (25262566393) and next prime (25262566409).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25262566401 - 2³ = 25262566393 is a prime.

It is a super-2 number, since 2×25262566401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25262566401.

It is not an unprimeable number, because it can be changed into a prime (25262566409) 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 7 ways as a sum of consecutive naturals, for example, 343321 + ... + 410358.

It is an arithmetic number, because the mean of its divisors is an integer number (4210810160).

Almost surely, 2^25262566401 is an apocalyptic number.

It is an amenable number.

25262566401 is a deficient number, since it is larger than the sum of its proper divisors (8423914879).

25262566401 is a wasteful number, since it uses less digits than its factorization.

25262566401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764855.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 25262566401 in words is "twenty-five billion, two hundred sixty-two million, five hundred sixty-six thousand, four hundred one".