71111688197 has 8 divisors (see below), whose sum is σ = 77673732192. Its totient is φ = 64565868400.

The previous prime is 71111688169. The next prime is 71111688247. The reversal of 71111688197 is 79188611117.

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

It is not a de Polignac number, because 71111688197 - 2¹² = 71111684101 is a prime.

It is a super-2 number, since 2×71111688197² (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 (71111688157) 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, 4046879 + ... + 4064412.

It is an arithmetic number, because the mean of its divisors is an integer number (9709216524).

Almost surely, 2^71111688197 is an apocalyptic number.

It is an amenable number.

71111688197 is a deficient number, since it is larger than the sum of its proper divisors (6562043995).

71111688197 is a wasteful number, since it uses less digits than its factorization.

71111688197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8112099.

The product of its digits is 169344, while the sum is 50.

The spelling of 71111688197 in words is "seventy-one billion, one hundred eleven million, six hundred eighty-eight thousand, one hundred ninety-seven".