73551724320 has 96 divisors (see below), whose sum is σ = 231912495360. Its totient is φ = 19594782720.

The previous prime is 73551724307. The next prime is 73551724321. The reversal of 73551724320 is 2342715537.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (73551724321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424980 + ... + 572460.

It is an arithmetic number, because the mean of its divisors is an integer number (2415755160).

Almost surely, 2^73551724320 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 73551724320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115956247680).

73551724320 is an abundant number, since it is smaller than the sum of its proper divisors (158360771040).

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

73551724320 is a wasteful number, since it uses less digits than its factorization.

73551724320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148538 (or 148530 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 73551724320 in words is "seventy-three billion, five hundred fifty-one million, seven hundred twenty-four thousand, three hundred twenty".