680268180091 has 2 divisors, whose sum is σ = 680268180092. Its totient is φ = 680268180090.

The previous prime is 680268180017. The next prime is 680268180107. The reversal of 680268180091 is 190081862086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680268180091 - 2²⁵ = 680234625659 is a prime.

It is not a weakly prime, because it can be changed into another prime (680268180001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340134090045 + 340134090046.

It is an arithmetic number, because the mean of its divisors is an integer number (340134090046).

Almost surely, 2^680268180091 is an apocalyptic number.

680268180091 is a deficient number, since it is larger than the sum of its proper divisors (1).

680268180091 is an equidigital number, since it uses as much as digits as its factorization.

680268180091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 49.

The spelling of 680268180091 in words is "six hundred eighty billion, two hundred sixty-eight million, one hundred eighty thousand, ninety-one".