78472338784672 has 72 divisors (see below), whose sum is σ = 179721355266180. Its totient is φ = 33629938191360.

The previous prime is 78472338784663. The next prime is 78472338784703. The reversal of 78472338784672 is 27648783327487.

It can be written as a sum of positive squares in 2 ways, for example, as 78189523290256 + 282815494416 = 8842484^2 + 531804^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49809604 + ... + 51360892.

Almost surely, 2^{78472338784672} is an apocalyptic number.

It is an amenable number.

78472338784672 is an abundant number, since it is smaller than the sum of its proper divisors (101249016481508).

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

78472338784672 is a wasteful number, since it uses less digits than its factorization.

78472338784672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583574 (or 1583559 counting only the distinct ones).

The product of its digits is 4248502272, while the sum is 76.

The spelling of 78472338784672 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred thirty-eight million, seven hundred eighty-four thousand, six hundred seventy-two".