72716680181 has 4 divisors (see below), whose sum is σ = 72717223200. Its totient is φ = 72716137164.

The previous prime is 72716680159. The next prime is 72716680189. The reversal of 72716680181 is 18108661727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72716680181 - 2¹⁴ = 72716663797 is a prime.

It is a super-2 number, since 2×72716680181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72716680189) 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, 88310 + ... + 391448.

It is an arithmetic number, because the mean of its divisors is an integer number (18179305800).

Almost surely, 2^72716680181 is an apocalyptic number.

It is an amenable number.

72716680181 is a deficient number, since it is larger than the sum of its proper divisors (543019).

72716680181 is a wasteful number, since it uses less digits than its factorization.

72716680181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543018.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 72716680181 in words is "seventy-two billion, seven hundred sixteen million, six hundred eighty thousand, one hundred eighty-one".