78299683321 has 2 divisors, whose sum is σ = 78299683322. Its totient is φ = 78299683320.

The previous prime is 78299683303. The next prime is 78299683433. The reversal of 78299683321 is 12338699287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56673039721 + 21626643600 = 238061^2 + 147060^2 .

It is a cyclic number.

It is not a de Polignac number, because 78299683321 - 2²⁷ = 78165465593 is a prime.

It is a super-2 number, since 2×78299683321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78299623321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39149841660 + 39149841661.

It is an arithmetic number, because the mean of its divisors is an integer number (39149841661).

Almost surely, 2^78299683321 is an apocalyptic number.

It is an amenable number.

78299683321 is a deficient number, since it is larger than the sum of its proper divisors (1).

78299683321 is an equidigital number, since it uses as much as digits as its factorization.

78299683321 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 78299683321 in words is "seventy-eight billion, two hundred ninety-nine million, six hundred eighty-three thousand, three hundred twenty-one".