71721272368 has 10 divisors (see below), whose sum is σ = 138959965244. Its totient is φ = 35860636176.

The previous prime is 71721272351. The next prime is 71721272383. The reversal of 71721272368 is 86327212717.

It is a super-3 number, since 3×71721272368³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2241289746 + ... + 2241289777.

Almost surely, 2^71721272368 is an apocalyptic number.

It is an amenable number.

71721272368 is a deficient number, since it is larger than the sum of its proper divisors (67238692876).

71721272368 is a wasteful number, since it uses less digits than its factorization.

71721272368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482579531 (or 4482579525 counting only the distinct ones).

The product of its digits is 395136, while the sum is 46.

The spelling of 71721272368 in words is "seventy-one billion, seven hundred twenty-one million, two hundred seventy-two thousand, three hundred sixty-eight".