72221782298 has 8 divisors (see below), whose sum is σ = 108805742580. Its totient is φ = 35953201440.

The previous prime is 72221782291. The next prime is 72221782301. The reversal of 72221782298 is 89228712227.

It can be written as a sum of positive squares in 2 ways, for example, as 66490232449 + 5731549849 = 257857^2 + 75707^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72221782291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78844283 + ... + 78845198.

Almost surely, 2^72221782298 is an apocalyptic number.

72221782298 is a deficient number, since it is larger than the sum of its proper divisors (36583960282).

72221782298 is a wasteful number, since it uses less digits than its factorization.

72221782298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157689712.

The product of its digits is 903168, while the sum is 50.

The spelling of 72221782298 in words is "seventy-two billion, two hundred twenty-one million, seven hundred eighty-two thousand, two hundred ninety-eight".