81833300738 has 24 divisors (see below), whose sum is σ = 142810735500. Its totient is φ = 35066508288.

The previous prime is 81833300729. The next prime is 81833300749. The reversal of 81833300738 is 83700333818.

It can be written as a sum of positive squares in 2 ways, for example, as 59850197449 + 21983103289 = 244643^2 + 148267^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 695018 + ... + 804186.

Almost surely, 2^81833300738 is an apocalyptic number.

81833300738 is a deficient number, since it is larger than the sum of its proper divisors (60977434762).

81833300738 is a wasteful number, since it uses less digits than its factorization.

81833300738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116834 (or 116827 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 81833300738 in words is "eighty-one billion, eight hundred thirty-three million, three hundred thousand, seven hundred thirty-eight".