335990918918981 has 4 divisors (see below), whose sum is σ = 343139661874752. Its totient is φ = 328842175963212.

The previous prime is 335990918918953. The next prime is 335990918919077. The reversal of 335990918918981 is 189819819099533.

It is an alternating factorial (335990918918981 = 17! - 16! + 15! - 14! + 13! - 12! + 11! - 10! + 9! - 8! + 7! - 6! + 5! - 4! + 3! - 2! + 1!).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 335990918918981 - 2¹⁸ = 335990918656837 is a prime.

It is a super-2 number, since 2×335990918918981² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 335990918918981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (335990918918911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3574371477815 + ... + 3574371477908.

It is an arithmetic number, because the mean of its divisors is an integer number (85784915468688).

Almost surely, 2^{335990918918981} is an apocalyptic number.

It is an amenable number.

335990918918981 is a deficient number, since it is larger than the sum of its proper divisors (7148742955771).

335990918918981 is an equidigital number, since it uses as much as digits as its factorization.

335990918918981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7148742955770.

The product of its (nonzero) digits is 1360488960, while the sum is 83.

The spelling of 335990918918981 in words is "three hundred thirty-five trillion, nine hundred ninety billion, nine hundred eighteen million, nine hundred eighteen thousand, nine hundred eighty-one".