73781066133 has 32 divisors (see below), whose sum is σ = 115701120000. Its totient is φ = 46338183216.

The previous prime is 73781066069. The next prime is 73781066137. The reversal of 73781066133 is 33166018737.

It is a happy number.

It is not a de Polignac number, because 73781066133 - 2⁶ = 73781066069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73781066137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309913 + ... + 493566.

It is an arithmetic number, because the mean of its divisors is an integer number (3615660000).

Almost surely, 2^73781066133 is an apocalyptic number.

It is an amenable number.

73781066133 is a deficient number, since it is larger than the sum of its proper divisors (41920053867).

73781066133 is a wasteful number, since it uses less digits than its factorization.

73781066133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803686 (or 803680 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 73781066133 in words is "seventy-three billion, seven hundred eighty-one million, sixty-six thousand, one hundred thirty-three".