71985990202 has 16 divisors (see below), whose sum is σ = 123409310400. Its totient is φ = 30849949728.

The previous prime is 71985990179. The next prime is 71985990233. The reversal of 71985990202 is 20209958917.

It is a self number, because there is not a number n which added to its sum of digits gives 71985990202.

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, 346174 + ... + 513622.

It is an arithmetic number, because the mean of its divisors is an integer number (7713081900).

Almost surely, 2^71985990202 is an apocalyptic number.

71985990202 is a deficient number, since it is larger than the sum of its proper divisors (51423320198).

71985990202 is a wasteful number, since it uses less digits than its factorization.

71985990202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198165.

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 71985990202 in words is "seventy-one billion, nine hundred eighty-five million, nine hundred ninety thousand, two hundred two".