71668549492 has 12 divisors (see below), whose sum is σ = 126014370496. Its totient is φ = 35664443640.

The previous prime is 71668549409. The next prime is 71668549501. The reversal of 71668549492 is 29494586617.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 71668549492.

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, 42456828 + ... + 42458515.

Almost surely, 2^71668549492 is an apocalyptic number.

It is an amenable number.

71668549492 is a deficient number, since it is larger than the sum of its proper divisors (54345821004).

71668549492 is a wasteful number, since it uses less digits than its factorization.

71668549492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84915558 (or 84915556 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

The spelling of 71668549492 in words is "seventy-one billion, six hundred sixty-eight million, five hundred forty-nine thousand, four hundred ninety-two".