73381856181 has 16 divisors (see below), whose sum is σ = 101008680960. Its totient is φ = 47338446960.

The previous prime is 73381856161. The next prime is 73381856213. The reversal of 73381856181 is 18165818337.

It is not a de Polignac number, because 73381856181 - 2⁶ = 73381856117 is a prime.

It is a super-2 number, since 2×73381856181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73381856101) 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, 1075750 + ... + 1141928.

It is an arithmetic number, because the mean of its divisors is an integer number (6313042560).

Almost surely, 2^73381856181 is an apocalyptic number.

It is an amenable number.

73381856181 is a deficient number, since it is larger than the sum of its proper divisors (27626824779).

73381856181 is a wasteful number, since it uses less digits than its factorization.

73381856181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78136.

The product of its digits is 967680, while the sum is 51.

The spelling of 73381856181 in words is "seventy-three billion, three hundred eighty-one million, eight hundred fifty-six thousand, one hundred eighty-one".