71982166436 has 24 divisors (see below), whose sum is σ = 129074261400. Its totient is φ = 35104256000.

The previous prime is 71982166423. The next prime is 71982166457. The reversal of 71982166436 is 63466128917.

It can be written as a sum of positive squares in 4 ways, for example, as 20884900 + 71961281536 = 4570^2 + 268256^2 .

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, 609836 + ... + 718236.

It is an arithmetic number, because the mean of its divisors is an integer number (5378094225).

Almost surely, 2^71982166436 is an apocalyptic number.

It is an amenable number.

71982166436 is a deficient number, since it is larger than the sum of its proper divisors (57092094964).

71982166436 is a wasteful number, since it uses less digits than its factorization.

71982166436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112495 (or 112493 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The spelling of 71982166436 in words is "seventy-one billion, nine hundred eighty-two million, one hundred sixty-six thousand, four hundred thirty-six".