81833364028 has 24 divisors (see below), whose sum is σ = 157985992080. Its totient is φ = 36848042880.

The previous prime is 81833364001. The next prime is 81833364071. The reversal of 81833364028 is 82046333818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19189558 + ... + 19193821.

It is an arithmetic number, because the mean of its divisors is an integer number (6582749670).

Almost surely, 2^81833364028 is an apocalyptic number.

It is an amenable number.

81833364028 is a deficient number, since it is larger than the sum of its proper divisors (76152628052).

81833364028 is a wasteful number, since it uses less digits than its factorization.

81833364028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38383437 (or 38383435 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 81833364028 in words is "eighty-one billion, eight hundred thirty-three million, three hundred sixty-four thousand, twenty-eight".