71699599012 has 6 divisors (see below), whose sum is σ = 125474298278. Its totient is φ = 35849799504.

The previous prime is 71699599003. The next prime is 71699599063. The reversal of 71699599012 is 21099599617.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71698630756 + 968256 = 267766^2 + 984^2 .

It is a super-2 number, since 2×71699599012² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8962449873 + ... + 8962449880.

Almost surely, 2^71699599012 is an apocalyptic number.

It is an amenable number.

71699599012 is a deficient number, since it is larger than the sum of its proper divisors (53774699266).

71699599012 is a wasteful number, since it uses less digits than its factorization.

71699599012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17924899757 (or 17924899755 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 58.

The spelling of 71699599012 in words is "seventy-one billion, six hundred ninety-nine million, five hundred ninety-nine thousand, twelve".