73721784108 has 144 divisors (see below), whose sum is σ = 204518537216. Its totient is φ = 20225341440.

The previous prime is 73721784053. The next prime is 73721784109. The reversal of 73721784108 is 80148712737.

It is a super-2 number, since 2×73721784108² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73721784109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192484885 + ... + 192485267.

Almost surely, 2^73721784108 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 73721784108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102259268608).

73721784108 is an abundant number, since it is smaller than the sum of its proper divisors (130796753108).

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

73721784108 is a wasteful number, since it uses less digits than its factorization.

73721784108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 73721784108 in words is "seventy-three billion, seven hundred twenty-one million, seven hundred eighty-four thousand, one hundred eight".