78343867822 has 48 divisors (see below), whose sum is σ = 131952492000. Its totient is φ = 34849742400.

The previous prime is 78343867801. The next prime is 78343867843. The reversal of 78343867822 is 22876834387.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78343867801) and next prime (78343867843).

It is a super-2 number, since 2×78343867822² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 2924304 + ... + 2950972.

It is an arithmetic number, because the mean of its divisors is an integer number (2749010250).

Almost surely, 2^78343867822 is an apocalyptic number.

78343867822 is a deficient number, since it is larger than the sum of its proper divisors (53608624178).

78343867822 is a wasteful number, since it uses less digits than its factorization.

78343867822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26953 (or 26942 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 58.

The spelling of 78343867822 in words is "seventy-eight billion, three hundred forty-three million, eight hundred sixty-seven thousand, eight hundred twenty-two".