78223253192 has 64 divisors (see below), whose sum is σ = 171564894720. Its totient is φ = 32738669568.

The previous prime is 78223253179. The next prime is 78223253203. The reversal of 78223253192 is 29135232287.

It is a super-2 number, since 2×78223253192² (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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170308 + ... + 1235340.

It is an arithmetic number, because the mean of its divisors is an integer number (2680701480).

Almost surely, 2^78223253192 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 78223253192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85782447360).

78223253192 is an abundant number, since it is smaller than the sum of its proper divisors (93341641528).

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

78223253192 is a wasteful number, since it uses less digits than its factorization.

78223253192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65550 (or 65546 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The spelling of 78223253192 in words is "seventy-eight billion, two hundred twenty-three million, two hundred fifty-three thousand, one hundred ninety-two".