78795459773 has 2 divisors, whose sum is σ = 78795459774. Its totient is φ = 78795459772.

The previous prime is 78795459749. The next prime is 78795459881. The reversal of 78795459773 is 37795459787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78155470969 + 639988804 = 279563^2 + 25298^2 .

It is a cyclic number.

It is not a de Polignac number, because 78795459773 - 2⁶ = 78795459709 is a prime.

It is a super-2 number, since 2×78795459773² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78795459697 and 78795459706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78795459373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39397729886 + 39397729887.

It is an arithmetic number, because the mean of its divisors is an integer number (39397729887).

Almost surely, 2^78795459773 is an apocalyptic number.

It is an amenable number.

78795459773 is a deficient number, since it is larger than the sum of its proper divisors (1).

78795459773 is an equidigital number, since it uses as much as digits as its factorization.

78795459773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466754400, while the sum is 71.

The spelling of 78795459773 in words is "seventy-eight billion, seven hundred ninety-five million, four hundred fifty-nine thousand, seven hundred seventy-three".