25627629221 has 2 divisors, whose sum is σ = 25627629222. Its totient is φ = 25627629220.

The previous prime is 25627629163. The next prime is 25627629271. The reversal of 25627629221 is 12292672652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22987108225 + 2640520996 = 151615^2 + 51386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25627629221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25627629271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12813814610 + 12813814611.

It is an arithmetic number, because the mean of its divisors is an integer number (12813814611).

Almost surely, 2^25627629221 is an apocalyptic number.

It is an amenable number.

25627629221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25627629221 is an equidigital number, since it uses as much as digits as its factorization.

25627629221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The spelling of 25627629221 in words is "twenty-five billion, six hundred twenty-seven million, six hundred twenty-nine thousand, two hundred twenty-one".