25667977243 has 2 divisors, whose sum is σ = 25667977244. Its totient is φ = 25667977242.

The previous prime is 25667977141. The next prime is 25667977261. The reversal of 25667977243 is 34277976652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25667977243 - 2¹³ = 25667969051 is a prime.

It is not a weakly prime, because it can be changed into another prime (25667977043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12833988621 + 12833988622.

It is an arithmetic number, because the mean of its divisors is an integer number (12833988622).

Almost surely, 2^25667977243 is an apocalyptic number.

25667977243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25667977243 is an equidigital number, since it uses as much as digits as its factorization.

25667977243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 58.

The spelling of 25667977243 in words is "twenty-five billion, six hundred sixty-seven million, nine hundred seventy-seven thousand, two hundred forty-three".