25573772251 has 2 divisors, whose sum is σ = 25573772252. Its totient is φ = 25573772250.

The previous prime is 25573772249. The next prime is 25573772317. The reversal of 25573772251 is 15227737552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25573772251 - 2¹ = 25573772249 is a prime.

Together with 25573772249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25573772951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12786886125 + 12786886126.

It is an arithmetic number, because the mean of its divisors is an integer number (12786886126).

Almost surely, 2^25573772251 is an apocalyptic number.

25573772251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25573772251 is an equidigital number, since it uses as much as digits as its factorization.

25573772251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1029000, while the sum is 46.

The spelling of 25573772251 in words is "twenty-five billion, five hundred seventy-three million, seven hundred seventy-two thousand, two hundred fifty-one".