81871164362 has 16 divisors (see below), whose sum is σ = 136519660032. Its totient is φ = 36567765360.

The previous prime is 81871164307. The next prime is 81871164373. The reversal of 81871164362 is 26346117818.

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, 50787758 + ... + 50789369.

It is an arithmetic number, because the mean of its divisors is an integer number (8532478752).

Almost surely, 2^81871164362 is an apocalyptic number.

81871164362 is a deficient number, since it is larger than the sum of its proper divisors (54648495670).

81871164362 is a wasteful number, since it uses less digits than its factorization.

81871164362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101577173.

The product of its digits is 387072, while the sum is 47.

The spelling of 81871164362 in words is "eighty-one billion, eight hundred seventy-one million, one hundred sixty-four thousand, three hundred sixty-two".