81763872998 has 8 divisors (see below), whose sum is σ = 122647037808. Its totient is φ = 40881527064.

The previous prime is 81763872941. The next prime is 81763873019. The reversal of 81763872998 is 89927836718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226940 + ... + 463712.

It is an arithmetic number, because the mean of its divisors is an integer number (15330879726).

Almost surely, 2^81763872998 is an apocalyptic number.

81763872998 is a deficient number, since it is larger than the sum of its proper divisors (40883164810).

81763872998 is a wasteful number, since it uses less digits than its factorization.

81763872998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409438.

The product of its digits is 73156608, while the sum is 68.

The spelling of 81763872998 in words is "eighty-one billion, seven hundred sixty-three million, eight hundred seventy-two thousand, nine hundred ninety-eight".