72229858642 has 4 divisors (see below), whose sum is σ = 108344787966. Its totient is φ = 36114929320.

The previous prime is 72229858639. The next prime is 72229858703. The reversal of 72229858642 is 24685892227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70081443441 + 2148415201 = 264729^2 + 46351^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18057464659 + ... + 18057464662.

Almost surely, 2^72229858642 is an apocalyptic number.

72229858642 is a deficient number, since it is larger than the sum of its proper divisors (36114929324).

72229858642 is a wasteful number, since it uses less digits than its factorization.

72229858642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36114929323.

The product of its digits is 7741440, while the sum is 55.

The spelling of 72229858642 in words is "seventy-two billion, two hundred twenty-nine million, eight hundred fifty-eight thousand, six hundred forty-two".