73721849539 has 16 divisors (see below), whose sum is σ = 80865872640. Its totient is φ = 66796722720.

The previous prime is 73721849527. The next prime is 73721849581. The reversal of 73721849539 is 93594812737.

It is a de Polignac number, because none of the positive numbers 2^k-73721849539 is a prime.

It is a super-2 number, since 2×73721849539² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73721849339) 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, 33592 + ... + 385450.

It is an arithmetic number, because the mean of its divisors is an integer number (5054117040).

Almost surely, 2^73721849539 is an apocalyptic number.

73721849539 is a deficient number, since it is larger than the sum of its proper divisors (7144023101).

73721849539 is a wasteful number, since it uses less digits than its factorization.

73721849539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352170.

The product of its digits is 11430720, while the sum is 58.

The spelling of 73721849539 in words is "seventy-three billion, seven hundred twenty-one million, eight hundred forty-nine thousand, five hundred thirty-nine".