73944817920 has 144 divisors (see below), whose sum is σ = 262401525120. Its totient is φ = 19718608896.

The previous prime is 73944817913. The next prime is 73944817949. The reversal of 73944817920 is 2971844937.

73944817920 is a `hidden beast` number, since 7 + 3 + 9 + 448 + 179 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1035244 + ... + 1104363.

Almost surely, 2^73944817920 is an apocalyptic number.

It is an amenable number.

73944817920 is an abundant number, since it is smaller than the sum of its proper divisors (188456707200).

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

73944817920 is a wasteful number, since it uses less digits than its factorization.

73944817920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139637 (or 2139617 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 73944817920 in words is "seventy-three billion, nine hundred forty-four million, eight hundred seventeen thousand, nine hundred twenty".