81935049033 has 12 divisors (see below), whose sum is σ = 118354564848. Its totient is φ = 54621548280.

The previous prime is 81935049029. The next prime is 81935049041. The reversal of 81935049033 is 33094053918.

81935049033 is a `hidden beast` number, since 81 + 9 + 3 + 50 + 490 + 33 = 666.

It is not a de Polignac number, because 81935049033 - 2² = 81935049029 is a prime.

It is a super-2 number, since 2×81935049033² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81935049033.

It is not an unprimeable number, because it can be changed into a prime (81935049533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169878 + ... + 439008.

It is an arithmetic number, because the mean of its divisors is an integer number (9862880404).

Almost surely, 2^81935049033 is an apocalyptic number.

It is an amenable number.

81935049033 is a deficient number, since it is larger than the sum of its proper divisors (36419515815).

81935049033 is a wasteful number, since it uses less digits than its factorization.

81935049033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302964 (or 302961 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 81935049033 in words is "eighty-one billion, nine hundred thirty-five million, forty-nine thousand, thirty-three".