78678437422 has 16 divisors (see below), whose sum is σ = 128836980720. Its totient is φ = 35815684032.

The previous prime is 78678437419. The next prime is 78678437447. The reversal of 78678437422 is 22473487687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20724772 + ... + 20728567.

It is an arithmetic number, because the mean of its divisors is an integer number (8052311295).

Almost surely, 2^78678437422 is an apocalyptic number.

78678437422 is a deficient number, since it is larger than the sum of its proper divisors (50158543298).

78678437422 is a wasteful number, since it uses less digits than its factorization.

78678437422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41453427.

The product of its digits is 25288704, while the sum is 58.

The spelling of 78678437422 in words is "seventy-eight billion, six hundred seventy-eight million, four hundred thirty-seven thousand, four hundred twenty-two".