73721731824 has 160 divisors (see below), whose sum is σ = 237794780160. Its totient is φ = 21697327872.

The previous prime is 73721731789. The next prime is 73721731877. The reversal of 73721731824 is 42813712737.

It is a self number, because there is not a number n which added to its sum of digits gives 73721731824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156204 + ... + 414539.

It is an arithmetic number, because the mean of its divisors is an integer number (1486217376).

Almost surely, 2^73721731824 is an apocalyptic number.

It is an amenable number.

73721731824 is an abundant number, since it is smaller than the sum of its proper divisors (164073048336).

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

73721731824 is a wasteful number, since it uses less digits than its factorization.

73721731824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570796 (or 570784 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The spelling of 73721731824 in words is "seventy-three billion, seven hundred twenty-one million, seven hundred thirty-one thousand, eight hundred twenty-four".