78226812216 has 96 divisors (see below), whose sum is σ = 248674739040. Its totient is φ = 21746444544.

The previous prime is 78226812137. The next prime is 78226812233. The reversal of 78226812216 is 61221862287.

It is a super-2 number, since 2×78226812216² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 2078811 + ... + 2116106.

It is an arithmetic number, because the mean of its divisors is an integer number (2590361865).

Almost surely, 2^78226812216 is an apocalyptic number.

It is an amenable number.

78226812216 is an abundant number, since it is smaller than the sum of its proper divisors (170447926824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78226812216 is a wasteful number, since it uses less digits than its factorization.

78226812216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194973 (or 4194966 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 78226812216 in words is "seventy-eight billion, two hundred twenty-six million, eight hundred twelve thousand, two hundred sixteen".