25626340221 has 32 divisors (see below), whose sum is σ = 34860134400. Its totient is φ = 16742303424.

The previous prime is 25626340183. The next prime is 25626340319. The reversal of 25626340221 is 12204362652.

It is a happy number.

It is not a de Polignac number, because 25626340221 - 2⁷ = 25626340093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25626340321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22941555 + ... + 22942671.

It is an arithmetic number, because the mean of its divisors is an integer number (1089379200).

Almost surely, 2^25626340221 is an apocalyptic number.

It is an amenable number.

25626340221 is a deficient number, since it is larger than the sum of its proper divisors (9233794179).

25626340221 is a wasteful number, since it uses less digits than its factorization.

25626340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 25626340221 in words is "twenty-five billion, six hundred twenty-six million, three hundred forty thousand, two hundred twenty-one".