33404731481 has 6 divisors (see below), whose sum is σ = 36717597546. Its totient is φ = 30367937600.

The previous prime is 33404731469. The next prime is 33404731483. The reversal of 33404731481 is 18413740433.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30663161881 + 2741569600 = 175109^2 + 52360^2 .

It is a de Polignac number, because none of the positive numbers 2^k-33404731481 is a prime.

It is a super-2 number, since 2×33404731481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33404731483) 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 5 ways as a sum of consecutive naturals, for example, 138035960 + ... + 138036201.

It is an arithmetic number, because the mean of its divisors is an integer number (6119599591).

Almost surely, 2^33404731481 is an apocalyptic number.

It is an amenable number.

33404731481 is a deficient number, since it is larger than the sum of its proper divisors (3312866065).

33404731481 is a wasteful number, since it uses less digits than its factorization.

33404731481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276072183 (or 276072172 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 33404731481 in words is "thirty-three billion, four hundred four million, seven hundred thirty-one thousand, four hundred eighty-one".