78731450330 has 64 divisors (see below), whose sum is σ = 153698096160. Its totient is φ = 29036547072.

The previous prime is 78731450321. The next prime is 78731450333. The reversal of 78731450330 is 3305413787.

It can be written as a sum of positive squares in 16 ways, for example, as 36110260729 + 42621189601 = 190027^2 + 206449^2 .

It is not an unprimeable number, because it can be changed into a prime (78731450333) 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, 27175442 + ... + 27178338.

Almost surely, 2^78731450330 is an apocalyptic number.

78731450330 is a deficient number, since it is larger than the sum of its proper divisors (74966645830).

78731450330 is a wasteful number, since it uses less digits than its factorization.

78731450330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180 (or 4154 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 78731450330 in words is "seventy-eight billion, seven hundred thirty-one million, four hundred fifty thousand, three hundred thirty".