71332081081 has 4 divisors (see below), whose sum is σ = 71332777600. Its totient is φ = 71331384564.

The previous prime is 71332081061. The next prime is 71332081087. The reversal of 71332081081 is 18018023317.

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 71332081081 - 2¹⁵ = 71332048313 is a prime.

It is a super-2 number, since 2×71332081081² (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 (71332081087) 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, 161121 + ... + 410638.

It is an arithmetic number, because the mean of its divisors is an integer number (17833194400).

Almost surely, 2^71332081081 is an apocalyptic number.

It is an amenable number.

71332081081 is a deficient number, since it is larger than the sum of its proper divisors (696519).

71332081081 is a wasteful number, since it uses less digits than its factorization.

71332081081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696518.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 71332081081 in words is "seventy-one billion, three hundred thirty-two million, eighty-one thousand, eighty-one".