25646826078751 has 2 divisors, whose sum is σ = 25646826078752. Its totient is φ = 25646826078750.

The previous prime is 25646826078697. The next prime is 25646826078761. The reversal of 25646826078751 is 15787062864652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25646826078751 - 2¹⁹ = 25646825554463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25646826078761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12823413039375 + 12823413039376.

It is an arithmetic number, because the mean of its divisors is an integer number (12823413039376).

Almost surely, 2^{25646826078751} is an apocalyptic number.

25646826078751 is a deficient number, since it is larger than the sum of its proper divisors (1).

25646826078751 is an equidigital number, since it uses as much as digits as its factorization.

25646826078751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270950400, while the sum is 67.

The spelling of 25646826078751 in words is "twenty-five trillion, six hundred forty-six billion, eight hundred twenty-six million, seventy-eight thousand, seven hundred fifty-one".