338235808581 has 36 divisors (see below), whose sum is σ = 545818984620. Its totient is φ = 201630844800.

The previous prime is 338235808507. The next prime is 338235808627. The reversal of 338235808581 is 185808532833.

It is a happy number.

338235808581 is a `hidden beast` number, since 3 + 3 + 8 + 2 + 3 + 58 + 0 + 8 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 80973824481 + 257261984100 = 284559^2 + 507210^2 .

It is not a de Polignac number, because 338235808581 - 2¹⁷ = 338235677509 is a prime.

It is a super-2 number, since 2×338235808581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338235808501) 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 35 ways as a sum of consecutive naturals, for example, 2479416 + ... + 2612273.

Almost surely, 2^338235808581 is an apocalyptic number.

It is an amenable number.

338235808581 is a deficient number, since it is larger than the sum of its proper divisors (207583176039).

338235808581 is a wasteful number, since it uses less digits than its factorization.

338235808581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091778 (or 5091764 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 338235808581 in words is "three hundred thirty-eight billion, two hundred thirty-five million, eight hundred eight thousand, five hundred eighty-one".