78682332991 has 2 divisors, whose sum is σ = 78682332992. Its totient is φ = 78682332990.

The previous prime is 78682332947. The next prime is 78682333007. The reversal of 78682332991 is 19923328687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78682332991 - 2⁹ = 78682332479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78682332791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39341166495 + 39341166496.

It is an arithmetic number, because the mean of its divisors is an integer number (39341166496).

Almost surely, 2^78682332991 is an apocalyptic number.

78682332991 is a deficient number, since it is larger than the sum of its proper divisors (1).

78682332991 is an equidigital number, since it uses as much as digits as its factorization.

78682332991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The spelling of 78682332991 in words is "seventy-eight billion, six hundred eighty-two million, three hundred thirty-two thousand, nine hundred ninety-one".