25667231393 has 2 divisors, whose sum is σ = 25667231394. Its totient is φ = 25667231392.

The previous prime is 25667231323. The next prime is 25667231411. The reversal of 25667231393 is 39313276652.

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., 15105147409 + 10562083984 = 122903^2 + 102772^2 .

It is a cyclic number.

It is not a de Polignac number, because 25667231393 - 2²⁶ = 25600122529 is a prime.

It is not a weakly prime, because it can be changed into another prime (25667231323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12833615696 + 12833615697.

It is an arithmetic number, because the mean of its divisors is an integer number (12833615697).

Almost surely, 2^25667231393 is an apocalyptic number.

It is an amenable number.

25667231393 is a deficient number, since it is larger than the sum of its proper divisors (1).

25667231393 is an equidigital number, since it uses as much as digits as its factorization.

25667231393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 47.

The spelling of 25667231393 in words is "twenty-five billion, six hundred sixty-seven million, two hundred thirty-one thousand, three hundred ninety-three".