71510664568 has 64 divisors (see below), whose sum is σ = 157435185600. Its totient is φ = 29808414720.

The previous prime is 71510664559. The next prime is 71510664569. The reversal of 71510664568 is 86546601517.

It is a super-2 number, since 2×71510664568² (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 (71510664569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8758408 + ... + 8766568.

It is an arithmetic number, because the mean of its divisors is an integer number (2459924775).

Almost surely, 2^71510664568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71510664568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78717592800).

71510664568 is an abundant number, since it is smaller than the sum of its proper divisors (85924521032).

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

71510664568 is a wasteful number, since it uses less digits than its factorization.

71510664568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12440 (or 12436 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 71510664568 in words is "seventy-one billion, five hundred ten million, six hundred sixty-four thousand, five hundred sixty-eight".