73108215161 has 4 divisors (see below), whose sum is σ = 73122518772. Its totient is φ = 73093911552.

The previous prime is 73108215137. The next prime is 73108215163. The reversal of 73108215161 is 16151280137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16151280137 = 2011 ⋅8031467.

It can be written as a sum of positive squares in 2 ways, for example, as 13483854400 + 59624360761 = 116120^2 + 244181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73108215161 is a prime.

It is a super-2 number, since 2×73108215161² (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 (73108215163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144136 + ... + 7154361.

It is an arithmetic number, because the mean of its divisors is an integer number (18280629693).

Almost surely, 2^73108215161 is an apocalyptic number.

It is an amenable number.

73108215161 is a deficient number, since it is larger than the sum of its proper divisors (14303611).

73108215161 is a wasteful number, since it uses less digits than its factorization.

73108215161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14303610.

The product of its (nonzero) digits is 10080, while the sum is 35.

Adding to 73108215161 its reverse (16151280137), we get a palindrome (89259495298).

The spelling of 73108215161 in words is "seventy-three billion, one hundred eight million, two hundred fifteen thousand, one hundred sixty-one".