268166031779 has 2 divisors, whose sum is σ = 268166031780. Its totient is φ = 268166031778.

The previous prime is 268166031677. The next prime is 268166031799. The reversal of 268166031779 is 977130661862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268166031779 is a prime.

It is not a weakly prime, because it can be changed into another prime (268166031799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134083015889 + 134083015890.

It is an arithmetic number, because the mean of its divisors is an integer number (134083015890).

Almost surely, 2^268166031779 is an apocalyptic number.

268166031779 is a deficient number, since it is larger than the sum of its proper divisors (1).

268166031779 is an equidigital number, since it uses as much as digits as its factorization.

268166031779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 268166031779 in words is "two hundred sixty-eight billion, one hundred sixty-six million, thirty-one thousand, seven hundred seventy-nine".