71111816508 has 12 divisors (see below), whose sum is σ = 165927571880. Its totient is φ = 23703938832.

The previous prime is 71111816471. The next prime is 71111816521. The reversal of 71111816508 is 80561811117.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×71111816508² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2962992343 + ... + 2962992366.

Almost surely, 2^71111816508 is an apocalyptic number.

It is an amenable number.

71111816508 is an abundant number, since it is smaller than the sum of its proper divisors (94815755372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71111816508 is a wasteful number, since it uses less digits than its factorization.

71111816508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5925984716 (or 5925984714 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 39.

The spelling of 71111816508 in words is "seventy-one billion, one hundred eleven million, eight hundred sixteen thousand, five hundred eight".