33855138437 has 2 divisors, whose sum is σ = 33855138438. Its totient is φ = 33855138436.

The previous prime is 33855138431. The next prime is 33855138451. The reversal of 33855138437 is 73483155833.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19741936036 + 14113202401 = 140506^2 + 118799^2 .

It is a cyclic number.

It is not a de Polignac number, because 33855138437 - 2²² = 33850944133 is a prime.

It is a super-2 number, since 2×33855138437² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33855138431) 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 as a sum of consecutive naturals, namely, 16927569218 + 16927569219.

It is an arithmetic number, because the mean of its divisors is an integer number (16927569219).

Almost surely, 2^33855138437 is an apocalyptic number.

It is an amenable number.

33855138437 is a deficient number, since it is larger than the sum of its proper divisors (1).

33855138437 is an equidigital number, since it uses as much as digits as its factorization.

33855138437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 50.

The spelling of 33855138437 in words is "thirty-three billion, eight hundred fifty-five million, one hundred thirty-eight thousand, four hundred thirty-seven".