72218293432 has 8 divisors (see below), whose sum is σ = 135409300200. Its totient is φ = 36109146712.

The previous prime is 72218293421. The next prime is 72218293493. The reversal of 72218293432 is 23439281227.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4513643332 + ... + 4513643347.

It is an arithmetic number, because the mean of its divisors is an integer number (16926162525).

Almost surely, 2^72218293432 is an apocalyptic number.

It is an amenable number.

72218293432 is a deficient number, since it is larger than the sum of its proper divisors (63191006768).

72218293432 is a wasteful number, since it uses less digits than its factorization.

72218293432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9027286685 (or 9027286681 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The spelling of 72218293432 in words is "seventy-two billion, two hundred eighteen million, two hundred ninety-three thousand, four hundred thirty-two".