35388665981 has 4 divisors (see below), whose sum is σ = 35393651100. Its totient is φ = 35383680864.

The previous prime is 35388665959. The next prime is 35388666013. The reversal of 35388665981 is 18956688353.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6680446756 + 28708219225 = 81734^2 + 169435^2 .

It is a cyclic number.

It is not a de Polignac number, because 35388665981 - 2³⁰ = 34314924157 is a prime.

It is a super-2 number, since 2×35388665981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35388365981) 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 3 ways as a sum of consecutive naturals, for example, 2481896 + ... + 2496113.

It is an arithmetic number, because the mean of its divisors is an integer number (8848412775).

Almost surely, 2^35388665981 is an apocalyptic number.

It is an amenable number.

35388665981 is a deficient number, since it is larger than the sum of its proper divisors (4985119).

35388665981 is an equidigital number, since it uses as much as digits as its factorization.

35388665981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985118.

The product of its digits is 37324800, while the sum is 62.

The spelling of 35388665981 in words is "thirty-five billion, three hundred eighty-eight million, six hundred sixty-five thousand, nine hundred eighty-one".