71729669899 has 8 divisors (see below), whose sum is σ = 78001740288. Its totient is φ = 65685674880.

The previous prime is 71729669867. The next prime is 71729669917. The reversal of 71729669899 is 99896692717.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71729669899 - 2⁵ = 71729669867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71729169899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57018187 + ... + 57019444.

It is an arithmetic number, because the mean of its divisors is an integer number (9750217536).

Almost surely, 2^71729669899 is an apocalyptic number.

71729669899 is a deficient number, since it is larger than the sum of its proper divisors (6272070389).

71729669899 is a wasteful number, since it uses less digits than its factorization.

71729669899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114037685.

The product of its digits is 185177664, while the sum is 73.

The spelling of 71729669899 in words is "seventy-one billion, seven hundred twenty-nine million, six hundred sixty-nine thousand, eight hundred ninety-nine".