73217381145 has 16 divisors (see below), whose sum is σ = 117156834432. Its totient is φ = 39046261760.

The previous prime is 73217381119. The next prime is 73217381161. The reversal of 73217381145 is 54118371237.

It is not a de Polignac number, because 73217381145 - 2³² = 68922413849 is a prime.

It is a super-2 number, since 2×73217381145² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73217381097 and 73217381106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20665 + ... + 383225.

It is an arithmetic number, because the mean of its divisors is an integer number (7322302152).

Almost surely, 2^73217381145 is an apocalyptic number.

It is an amenable number.

73217381145 is a deficient number, since it is larger than the sum of its proper divisors (43939453287).

73217381145 is a wasteful number, since it uses less digits than its factorization.

73217381145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376032.

The product of its digits is 141120, while the sum is 42.

It can be divided in two parts, 732173 and 81145, that added together give a palindrome (813318).

The spelling of 73217381145 in words is "seventy-three billion, two hundred seventeen million, three hundred eighty-one thousand, one hundred forty-five".