25426265221 has 8 divisors (see below), whose sum is σ = 29088157824. Its totient is φ = 21771764880.

The previous prime is 25426265213. The next prime is 25426265269. The reversal of 25426265221 is 12256262452.

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

It is a cyclic number.

It is not a de Polignac number, because 25426265221 - 2³ = 25426265213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25426265201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1840690 + ... + 1854451.

It is an arithmetic number, because the mean of its divisors is an integer number (3636019728).

Almost surely, 2^25426265221 is an apocalyptic number.

It is an amenable number.

25426265221 is a deficient number, since it is larger than the sum of its proper divisors (3661892603).

25426265221 is an equidigital number, since it uses as much as digits as its factorization.

25426265221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696131.

The product of its digits is 115200, while the sum is 37.

The spelling of 25426265221 in words is "twenty-five billion, four hundred twenty-six million, two hundred sixty-five thousand, two hundred twenty-one".