251064640743827 has 2 divisors, whose sum is σ = 251064640743828. Its totient is φ = 251064640743826.

The previous prime is 251064640743739. The next prime is 251064640743911. The reversal of 251064640743827 is 728347046460152.

251064640743827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251064640743827 - 2⁸ = 251064640743571 is a prime.

It is not a weakly prime, because it can be changed into another prime (251064640745827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125532320371913 + 125532320371914.

It is an arithmetic number, because the mean of its divisors is an integer number (125532320371914).

Almost surely, 2^{251064640743827} is an apocalyptic number.

251064640743827 is a deficient number, since it is larger than the sum of its proper divisors (1).

251064640743827 is an equidigital number, since it uses as much as digits as its factorization.

251064640743827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54190080, while the sum is 59.

The spelling of 251064640743827 in words is "two hundred fifty-one trillion, sixty-four billion, six hundred forty million, seven hundred forty-three thousand, eight hundred twenty-seven".