81719102284 has 24 divisors (see below), whose sum is σ = 144723559568. Its totient is φ = 40370918400.

The previous prime is 81719102237. The next prime is 81719102341. The reversal of 81719102284 is 48220191718.

It is a self number, because there is not a number n which added to its sum of digits gives 81719102284.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57967 + ... + 408409.

Almost surely, 2^81719102284 is an apocalyptic number.

It is an amenable number.

81719102284 is a deficient number, since it is larger than the sum of its proper divisors (63004457284).

81719102284 is a wasteful number, since it uses less digits than its factorization.

81719102284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351145 (or 351143 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 81719102284 in words is "eighty-one billion, seven hundred nineteen million, one hundred two thousand, two hundred eighty-four".