71947136799 has 24 divisors (see below), whose sum is σ = 106158260000. Its totient is φ = 46941301440.

The previous prime is 71947136797. The next prime is 71947136819. The reversal of 71947136799 is 99763174917.

71947136799 is a `hidden beast` number, since 7 + 19 + 471 + 3 + 67 + 99 = 666.

It is not a de Polignac number, because 71947136799 - 2¹ = 71947136797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71947136797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220024 + ... + 438525.

Almost surely, 2^71947136799 is an apocalyptic number.

71947136799 is a deficient number, since it is larger than the sum of its proper divisors (34211123201).

71947136799 is a wasteful number, since it uses less digits than its factorization.

71947136799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658815 (or 658812 counting only the distinct ones).

The product of its digits is 18003384, while the sum is 63.

The spelling of 71947136799 in words is "seventy-one billion, nine hundred forty-seven million, one hundred thirty-six thousand, seven hundred ninety-nine".