73721849538 has 32 divisors (see below), whose sum is σ = 154241951616. Its totient is φ = 23446291968.

The previous prime is 73721849527. The next prime is 73721849581. The reversal of 73721849538 is 83594812737.

It is a super-2 number, since 2×73721849538² (a number of 23 digits) contains 22 as substring.

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, 618031 + ... + 727602.

It is an arithmetic number, because the mean of its divisors is an integer number (4820060988).

Almost surely, 2^73721849538 is an apocalyptic number.

73721849538 is an abundant number, since it is smaller than the sum of its proper divisors (80520102078).

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

73721849538 is a wasteful number, since it uses less digits than its factorization.

73721849538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346058.

The product of its digits is 10160640, while the sum is 57.

The spelling of 73721849538 in words is "seventy-three billion, seven hundred twenty-one million, eight hundred forty-nine thousand, five hundred thirty-eight".