72221793679 has 8 divisors (see below), whose sum is σ = 82543039488. Its totient is φ = 61901509560.

The previous prime is 72221793619. The next prime is 72221793733. The reversal of 72221793679 is 97639712227.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72221793679 - 2¹⁵ = 72221760911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72221793619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71587 + ... + 386740.

It is an arithmetic number, because the mean of its divisors is an integer number (10317879936).

Almost surely, 2^72221793679 is an apocalyptic number.

72221793679 is a deficient number, since it is larger than the sum of its proper divisors (10321245809).

72221793679 is a wasteful number, since it uses less digits than its factorization.

72221793679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480845.

The product of its digits is 4000752, while the sum is 55.

The spelling of 72221793679 in words is "seventy-two billion, two hundred twenty-one million, seven hundred ninety-three thousand, six hundred seventy-nine".