349861591699 has 4 divisors (see below), whose sum is σ = 351519703720. Its totient is φ = 348203479680.

The previous prime is 349861591661. The next prime is 349861591711. The reversal of 349861591699 is 996195168943.

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

It is a cyclic number.

It is not a de Polignac number, because 349861591699 - 2⁹ = 349861591187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349861591199) 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, 829055694 + ... + 829056115.

It is an arithmetic number, because the mean of its divisors is an integer number (87879925930).

Almost surely, 2^349861591699 is an apocalyptic number.

349861591699 is a deficient number, since it is larger than the sum of its proper divisors (1658112021).

349861591699 is a wasteful number, since it uses less digits than its factorization.

349861591699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658112020.

The product of its digits is 113374080, while the sum is 70.

The spelling of 349861591699 in words is "three hundred forty-nine billion, eight hundred sixty-one million, five hundred ninety-one thousand, six hundred ninety-nine".