78823793077 has 2 divisors, whose sum is σ = 78823793078. Its totient is φ = 78823793076.

The previous prime is 78823793029. The next prime is 78823793101. The reversal of 78823793077 is 77039732887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50769553041 + 28054240036 = 225321^2 + 167494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78823793077 is a prime.

It is a super-3 number, since 3×78823793077³ (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 (78823793177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39411896538 + 39411896539.

It is an arithmetic number, because the mean of its divisors is an integer number (39411896539).

Almost surely, 2^78823793077 is an apocalyptic number.

It is an amenable number.

78823793077 is a deficient number, since it is larger than the sum of its proper divisors (1).

78823793077 is an equidigital number, since it uses as much as digits as its factorization.

78823793077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24893568, while the sum is 61.

The spelling of 78823793077 in words is "seventy-eight billion, eight hundred twenty-three million, seven hundred ninety-three thousand, seventy-seven".