71734072191 has 16 divisors (see below), whose sum is σ = 97882430976. Its totient is φ = 46704502656.

The previous prime is 71734072187. The next prime is 71734072297. The reversal of 71734072191 is 19127043717.

It is not a de Polignac number, because 71734072191 - 2² = 71734072187 is a prime.

It is a super-2 number, since 2×71734072191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71734072121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1101351 + ... + 1164663.

It is an arithmetic number, because the mean of its divisors is an integer number (6117651936).

Almost surely, 2^71734072191 is an apocalyptic number.

71734072191 is a deficient number, since it is larger than the sum of its proper divisors (26148358785).

71734072191 is a wasteful number, since it uses less digits than its factorization.

71734072191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72142.

The product of its (nonzero) digits is 74088, while the sum is 42.

The spelling of 71734072191 in words is "seventy-one billion, seven hundred thirty-four million, seventy-two thousand, one hundred ninety-one".