71984129078 has 16 divisors (see below), whose sum is σ = 114396572160. Its totient is φ = 33854487936.

The previous prime is 71984129069. The next prime is 71984129093. The reversal of 71984129078 is 87092148917.

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, 580013 + ... + 693096.

It is an arithmetic number, because the mean of its divisors is an integer number (7149785760).

Almost surely, 2^71984129078 is an apocalyptic number.

71984129078 is a deficient number, since it is larger than the sum of its proper divisors (42412443082).

71984129078 is a wasteful number, since it uses less digits than its factorization.

71984129078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274791.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The spelling of 71984129078 in words is "seventy-one billion, nine hundred eighty-four million, one hundred twenty-nine thousand, seventy-eight".