73221018145 has 8 divisors (see below), whose sum is σ = 95852969280. Its totient is φ = 53251649520.

The previous prime is 73221018133. The next prime is 73221018161. The reversal of 73221018145 is 54181012237.

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

It is a de Polignac number, because none of the positive numbers 2^k-73221018145 is a prime.

It is a super-2 number, since 2×73221018145² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73221018145.

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, 665645565 + ... + 665645674.

It is an arithmetic number, because the mean of its divisors is an integer number (11981621160).

Almost surely, 2^73221018145 is an apocalyptic number.

It is an amenable number.

73221018145 is a deficient number, since it is larger than the sum of its proper divisors (22631951135).

73221018145 is a wasteful number, since it uses less digits than its factorization.

73221018145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331291255.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 73221018145 in words is "seventy-three billion, two hundred twenty-one million, eighteen thousand, one hundred forty-five".