81833368948 has 12 divisors (see below), whose sum is σ = 146701283652. Its totient is φ = 39918716480.

The previous prime is 81833368879. The next prime is 81833369119. The reversal of 81833368948 is 84986333818.

It can be written as a sum of positive squares in 2 ways, for example, as 13135910544 + 68697458404 = 114612^2 + 262102^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249491815 + ... + 249492142.

It is an arithmetic number, because the mean of its divisors is an integer number (12225106971).

Almost surely, 2^81833368948 is an apocalyptic number.

It is an amenable number.

81833368948 is a deficient number, since it is larger than the sum of its proper divisors (64867914704).

81833368948 is a wasteful number, since it uses less digits than its factorization.

81833368948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498984002 (or 498984000 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 61.

The spelling of 81833368948 in words is "eighty-one billion, eight hundred thirty-three million, three hundred sixty-eight thousand, nine hundred forty-eight".