72221673884 has 24 divisors (see below), whose sum is σ = 129919092240. Its totient is φ = 35103666816.

The previous prime is 72221673827. The next prime is 72221673907. The reversal of 72221673884 is 48837612227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49022 + ... + 383205.

It is an arithmetic number, because the mean of its divisors is an integer number (5413295510).

Almost surely, 2^72221673884 is an apocalyptic number.

72221673884 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

72221673884 is a deficient number, since it is larger than the sum of its proper divisors (57697418356).

72221673884 is a wasteful number, since it uses less digits than its factorization.

72221673884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433397 (or 433395 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The spelling of 72221673884 in words is "seventy-two billion, two hundred twenty-one million, six hundred seventy-three thousand, eight hundred eighty-four".