78222768878 has 16 divisors (see below), whose sum is σ = 120262440960. Its totient is φ = 38145728376.

The previous prime is 78222768859. The next prime is 78222768881. The reversal of 78222768878 is 87886722287.

It is a super-2 number, since 2×78222768878² (a number of 23 digits) contains 22 as substring.

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, 2594876 + ... + 2624847.

It is an arithmetic number, because the mean of its divisors is an integer number (7516402560).

Almost surely, 2^78222768878 is an apocalyptic number.

78222768878 is a deficient number, since it is larger than the sum of its proper divisors (42039672082).

78222768878 is a wasteful number, since it uses less digits than its factorization.

78222768878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219911.

The product of its digits is 67436544, while the sum is 65.

The spelling of 78222768878 in words is "seventy-eight billion, two hundred twenty-two million, seven hundred sixty-eight thousand, eight hundred seventy-eight".