33638494889 has 2 divisors, whose sum is σ = 33638494890. Its totient is φ = 33638494888.

The previous prime is 33638494831. The next prime is 33638494927. The reversal of 33638494889 is 98849483633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31145190400 + 2493304489 = 176480^2 + 49933^2 .

It is a cyclic number.

It is not a de Polignac number, because 33638494889 - 2³² = 29343527593 is a prime.

It is a super-2 number, since 2×33638494889² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33638434889) 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 as a sum of consecutive naturals, namely, 16819247444 + 16819247445.

It is an arithmetic number, because the mean of its divisors is an integer number (16819247445).

Almost surely, 2^33638494889 is an apocalyptic number.

It is an amenable number.

33638494889 is a deficient number, since it is larger than the sum of its proper divisors (1).

33638494889 is an equidigital number, since it uses as much as digits as its factorization.

33638494889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107495424, while the sum is 65.

The spelling of 33638494889 in words is "thirty-three billion, six hundred thirty-eight million, four hundred ninety-four thousand, eight hundred eighty-nine".