78821518822 has 8 divisors (see below), whose sum is σ = 118294088616. Its totient is φ = 39390155952.

The previous prime is 78821518817. The next prime is 78821518837. The reversal of 78821518822 is 22881512887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78821518822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10296948 + ... + 10304599.

It is an arithmetic number, because the mean of its divisors is an integer number (14786761077).

Almost surely, 2^78821518822 is an apocalyptic number.

78821518822 is a deficient number, since it is larger than the sum of its proper divisors (39472569794).

78821518822 is a wasteful number, since it uses less digits than its factorization.

78821518822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20603462.

The product of its digits is 1146880, while the sum is 52.

The spelling of 78821518822 in words is "seventy-eight billion, eight hundred twenty-one million, five hundred eighteen thousand, eight hundred twenty-two".