72788486194 has 4 divisors (see below), whose sum is σ = 109182729294. Its totient is φ = 36394243096.

The previous prime is 72788486191. The next prime is 72788486201. The reversal of 72788486194 is 49168488727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49168488727 = 18089 ⋅2718143.

It can be written as a sum of positive squares in only one way, i.e., 71826680025 + 961806169 = 268005^2 + 31013^2 .

It is not an unprimeable number, because it can be changed into a prime (72788486191) by changing a digit.

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 as a sum of consecutive naturals, namely, 18197121547 + ... + 18197121550.

Almost surely, 2^72788486194 is an apocalyptic number.

72788486194 is a deficient number, since it is larger than the sum of its proper divisors (36394243100).

72788486194 is a wasteful number, since it uses less digits than its factorization.

72788486194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36394243099.

The product of its digits is 43352064, while the sum is 64.

The spelling of 72788486194 in words is "seventy-two billion, seven hundred eighty-eight million, four hundred eighty-six thousand, one hundred ninety-four".