81962834567 has 8 divisors (see below), whose sum is σ = 82080300240. Its totient is φ = 81845415360.

The previous prime is 81962834537. The next prime is 81962834593. The reversal of 81962834567 is 76543826918.

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

It is a cyclic number.

It is not a de Polignac number, because 81962834567 - 2¹⁸ = 81962572423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81962834537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001467 + ... + 5017827.

It is an arithmetic number, because the mean of its divisors is an integer number (10260037530).

Almost surely, 2^81962834567 is an apocalyptic number.

81962834567 is a deficient number, since it is larger than the sum of its proper divisors (117465673).

81962834567 is a wasteful number, since it uses less digits than its factorization.

81962834567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23233.

The product of its digits is 17418240, while the sum is 59.

The spelling of 81962834567 in words is "eighty-one billion, nine hundred sixty-two million, eight hundred thirty-four thousand, five hundred sixty-seven".