72734971224 has 64 divisors (see below), whose sum is σ = 188338284000. Its totient is φ = 23380259840.

The previous prime is 72734971217. The next prime is 72734971241. The reversal of 72734971224 is 42217943727.

It is a super-2 number, since 2×72734971224² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507772 + ... + 635060.

Almost surely, 2^72734971224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72734971224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94169142000).

72734971224 is an abundant number, since it is smaller than the sum of its proper divisors (115603312776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72734971224 is a wasteful number, since it uses less digits than its factorization.

72734971224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128148 (or 128144 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 48.

The spelling of 72734971224 in words is "seventy-two billion, seven hundred thirty-four million, nine hundred seventy-one thousand, two hundred twenty-four".