71728969078 has 16 divisors (see below), whose sum is σ = 115877938176. Its totient is φ = 33103373760.

The previous prime is 71728969061. The next prime is 71728969121. The reversal of 71728969078 is 87096982717.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318475 + ... + 494857.

It is an arithmetic number, because the mean of its divisors is an integer number (7242371136).

Almost surely, 2^71728969078 is an apocalyptic number.

71728969078 is a deficient number, since it is larger than the sum of its proper divisors (44148969098).

71728969078 is a wasteful number, since it uses less digits than its factorization.

71728969078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192039.

The product of its (nonzero) digits is 21337344, while the sum is 64.

The spelling of 71728969078 in words is "seventy-one billion, seven hundred twenty-eight million, nine hundred sixty-nine thousand, seventy-eight".