71613323261 has 8 divisors (see below), whose sum is σ = 73527115200. Its totient is φ = 69707489760.

The previous prime is 71613323239. The next prime is 71613323297. The reversal of 71613323261 is 16232331617.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71613323261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71613328261) 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, 1971371 + ... + 2007368.

It is an arithmetic number, because the mean of its divisors is an integer number (9190889400).

Almost surely, 2^71613323261 is an apocalyptic number.

It is an amenable number.

71613323261 is a deficient number, since it is larger than the sum of its proper divisors (1913791939).

71613323261 is a wasteful number, since it uses less digits than its factorization.

71613323261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979219.

The product of its digits is 27216, while the sum is 35.

Adding to 71613323261 its reverse (16232331617), we get a palindrome (87845654878).

The spelling of 71613323261 in words is "seventy-one billion, six hundred thirteen million, three hundred twenty-three thousand, two hundred sixty-one".