81333900748 has 6 divisors (see below), whose sum is σ = 142334326316. Its totient is φ = 40666950372.

The previous prime is 81333900629. The next prime is 81333900779. The reversal of 81333900748 is 84700933318.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81333900698 and 81333900707.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166737590 + ... + 10166737597.

Almost surely, 2^81333900748 is an apocalyptic number.

It is an amenable number.

81333900748 is a deficient number, since it is larger than the sum of its proper divisors (61000425568).

81333900748 is a wasteful number, since it uses less digits than its factorization.

81333900748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20333475191 (or 20333475189 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

It can be divided in two parts, 81333 and 900748, that added together give a square (982081 = 991²).

The spelling of 81333900748 in words is "eighty-one billion, three hundred thirty-three million, nine hundred thousand, seven hundred forty-eight".