78105977359 has 2 divisors, whose sum is σ = 78105977360. Its totient is φ = 78105977358.

The previous prime is 78105977333. The next prime is 78105977377. The reversal of 78105977359 is 95377950187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78105977359 - 2⁷ = 78105977231 is a prime.

It is a super-2 number, since 2×78105977359² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78105977297 and 78105977306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78105977659) 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, 39052988679 + 39052988680.

It is an arithmetic number, because the mean of its divisors is an integer number (39052988680).

Almost surely, 2^78105977359 is an apocalyptic number.

78105977359 is a deficient number, since it is larger than the sum of its proper divisors (1).

78105977359 is an equidigital number, since it uses as much as digits as its factorization.

78105977359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16669800, while the sum is 61.

The spelling of 78105977359 in words is "seventy-eight billion, one hundred five million, nine hundred seventy-seven thousand, three hundred fifty-nine".