108351990613 has 4 divisors (see below), whose sum is σ = 108495124780. Its totient is φ = 108208856448.

The previous prime is 108351990611. The next prime is 108351990661. The reversal of 108351990613 is 316099153801.

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 95007582289 + 13344408324 = 308233^2 + 115518^2 .

It is a cyclic number.

It is not a de Polignac number, because 108351990613 - 2¹ = 108351990611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108351990611) 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, 71565948 + ... + 71567461.

It is an arithmetic number, because the mean of its divisors is an integer number (27123781195).

Almost surely, 2^108351990613 is an apocalyptic number.

It is an amenable number.

108351990613 is a deficient number, since it is larger than the sum of its proper divisors (143134167).

108351990613 is an equidigital number, since it uses as much as digits as its factorization.

108351990613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143134166.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 108351990613 in words is "one hundred eight billion, three hundred fifty-one million, nine hundred ninety thousand, six hundred thirteen".