78982718797 has 2 divisors, whose sum is σ = 78982718798. Its totient is φ = 78982718796.

The previous prime is 78982718779. The next prime is 78982718827. The reversal of 78982718797 is 79781728987.

Together with previous prime (78982718779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42626144521 + 36356574276 = 206461^2 + 190674^2 .

It is a cyclic number.

It is not a de Polignac number, because 78982718797 - 2⁷ = 78982718669 is a prime.

It is a super-3 number, since 3×78982718797³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78982718767) 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, 39491359398 + 39491359399.

It is an arithmetic number, because the mean of its divisors is an integer number (39491359399).

Almost surely, 2^78982718797 is an apocalyptic number.

It is an amenable number.

78982718797 is a deficient number, since it is larger than the sum of its proper divisors (1).

78982718797 is an equidigital number, since it uses as much as digits as its factorization.

78982718797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 199148544, while the sum is 73.

The spelling of 78982718797 in words is "seventy-eight billion, nine hundred eighty-two million, seven hundred eighteen thousand, seven hundred ninety-seven".