78581999232 has 256 divisors, whose sum is σ = 254726640000. Its totient is φ = 23651205120.

The previous prime is 78581999201. The next prime is 78581999233. The reversal of 78581999232 is 23299918587.

It is a self number, because there is not a number n which added to its sum of digits gives 78581999232.

It is not an unprimeable number, because it can be changed into a prime (78581999233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5657448 + ... + 5671320.

Almost surely, 2^78581999232 is an apocalyptic number.

78581999232 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78581999232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127363320000).

78581999232 is an abundant number, since it is smaller than the sum of its proper divisors (176144640768).

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

78581999232 is a wasteful number, since it uses less digits than its factorization.

78581999232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056 (or 14038 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 78581999232 in words is "seventy-eight billion, five hundred eighty-one million, nine hundred ninety-nine thousand, two hundred thirty-two".