72181295947871 has 8 divisors (see below), whose sum is σ = 81458515803600. Its totient is φ = 63356623402240.

The previous prime is 72181295947867. The next prime is 72181295947897. The reversal of 72181295947871 is 17874959218127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72181295947871 - 2² = 72181295947867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72181295947795 and 72181295947804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72181295947861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113136827186 + ... + 113136827823.

It is an arithmetic number, because the mean of its divisors is an integer number (10182314475450).

Almost surely, 2^{72181295947871} is an apocalyptic number.

72181295947871 is a deficient number, since it is larger than the sum of its proper divisors (9277219855729).

72181295947871 is a wasteful number, since it uses less digits than its factorization.

72181295947871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226273655049.

The product of its digits is 142248960, while the sum is 71.

The spelling of 72181295947871 in words is "seventy-two trillion, one hundred eighty-one billion, two hundred ninety-five million, nine hundred forty-seven thousand, eight hundred seventy-one".