72182221045 has 32 divisors (see below), whose sum is σ = 97784547840. Its totient is φ = 50668800000.

The previous prime is 72182221019. The next prime is 72182221063. The reversal of 72182221045 is 54012228127.

It is not a de Polignac number, because 72182221045 - 2⁹ = 72182220533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72182221045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6375940 + ... + 6387250.

It is an arithmetic number, because the mean of its divisors is an integer number (3055767120).

Almost surely, 2^72182221045 is an apocalyptic number.

It is an amenable number.

72182221045 is a deficient number, since it is larger than the sum of its proper divisors (25602326795).

72182221045 is a wasteful number, since it uses less digits than its factorization.

72182221045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15357.

The product of its (nonzero) digits is 17920, while the sum is 34.

The spelling of 72182221045 in words is "seventy-two billion, one hundred eighty-two million, two hundred twenty-one thousand, forty-five".