81334801334 has 4 divisors (see below), whose sum is σ = 122002202004. Its totient is φ = 40667400666.

The previous prime is 81334801291. The next prime is 81334801357. The reversal of 81334801334 is 43310843318.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20333700332 + ... + 20333700335.

It is an arithmetic number, because the mean of its divisors is an integer number (30500550501).

Almost surely, 2^81334801334 is an apocalyptic number.

81334801334 is a deficient number, since it is larger than the sum of its proper divisors (40667400670).

81334801334 is a wasteful number, since it uses less digits than its factorization.

81334801334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40667400669.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 81334801334 in words is "eighty-one billion, three hundred thirty-four million, eight hundred one thousand, three hundred thirty-four".