343618691981 has 8 divisors (see below), whose sum is σ = 343920393600. Its totient is φ = 343317057408.

The previous prime is 343618691957. The next prime is 343618692031. The reversal of 343618691981 is 189196816343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343618691981 - 2⁶ = 343618691917 is a prime.

It is a super-2 number, since 2×343618691981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343618691981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343618691081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20757950 + ... + 20774496.

It is an arithmetic number, because the mean of its divisors is an integer number (42990049200).

Almost surely, 2^343618691981 is an apocalyptic number.

It is an amenable number.

343618691981 is a deficient number, since it is larger than the sum of its proper divisors (301701619).

343618691981 is a wasteful number, since it uses less digits than its factorization.

343618691981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33523.

The product of its digits is 6718464, while the sum is 59.

The spelling of 343618691981 in words is "three hundred forty-three billion, six hundred eighteen million, six hundred ninety-one thousand, nine hundred eighty-one".