81962834568 has 16 divisors (see below), whose sum is σ = 204907086480. Its totient is φ = 27320944848.

The previous prime is 81962834537. The next prime is 81962834593. The reversal of 81962834568 is 86543826918.

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 3 ways as a sum of consecutive naturals, for example, 1707559030 + ... + 1707559077.

It is an arithmetic number, because the mean of its divisors is an integer number (12806692905).

Almost surely, 2^81962834568 is an apocalyptic number.

It is an amenable number.

81962834568 is an abundant number, since it is smaller than the sum of its proper divisors (122944251912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81962834568 is a wasteful number, since it uses less digits than its factorization.

81962834568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415118116 (or 3415118112 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 60.

The spelling of 81962834568 in words is "eighty-one billion, nine hundred sixty-two million, eight hundred thirty-four thousand, five hundred sixty-eight".