78322672672 has 48 divisors (see below), whose sum is σ = 157872939840. Its totient is φ = 38228988672.

The previous prime is 78322672669. The next prime is 78322672733. The reversal of 78322672672 is 27627622387.

It is a super-2 number, since 2×78322672672² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2570358 + ... + 2600650.

It is an arithmetic number, because the mean of its divisors is an integer number (3289019580).

Almost surely, 2^78322672672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78322672672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78936469920).

78322672672 is an abundant number, since it is smaller than the sum of its proper divisors (79550267168).

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

78322672672 is a wasteful number, since it uses less digits than its factorization.

78322672672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32225 (or 32217 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 52.

The spelling of 78322672672 in words is "seventy-eight billion, three hundred twenty-two million, six hundred seventy-two thousand, six hundred seventy-two".