25272168157 has 2 divisors, whose sum is σ = 25272168158. Its totient is φ = 25272168156.

The previous prime is 25272168139. The next prime is 25272168169. The reversal of 25272168157 is 75186127252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15717887641 + 9554280516 = 125371^2 + 97746^2 .

It is a cyclic number.

It is not a de Polignac number, because 25272168157 - 2¹¹ = 25272166109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25272168107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12636084078 + 12636084079.

It is an arithmetic number, because the mean of its divisors is an integer number (12636084079).

Almost surely, 2^25272168157 is an apocalyptic number.

It is an amenable number.

25272168157 is a deficient number, since it is larger than the sum of its proper divisors (1).

25272168157 is an equidigital number, since it uses as much as digits as its factorization.

25272168157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 46.

The spelling of 25272168157 in words is "twenty-five billion, two hundred seventy-two million, one hundred sixty-eight thousand, one hundred fifty-seven".