105186668389 has 6 divisors (see below), whose sum is σ = 115618404230. Its totient is φ = 95624243880.

The previous prime is 105186668369. The next prime is 105186668399. The reversal of 105186668389 is 983866681501.

It can be written as a sum of positive squares in only one way, i.e., 94086360225 + 11100308164 = 306735^2 + 105358^2 .

It is not a de Polignac number, because 105186668389 - 2⁹ = 105186667877 is a prime.

It is a super-2 number, since 2×105186668389² (a number of 23 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 (105186668339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 434655534 + ... + 434655775.

Almost surely, 2^105186668389 is an apocalyptic number.

It is an amenable number.

105186668389 is a deficient number, since it is larger than the sum of its proper divisors (10431735841).

105186668389 is an equidigital number, since it uses as much as digits as its factorization.

105186668389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869311331 (or 869311320 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 105186668389 in words is "one hundred five billion, one hundred eighty-six million, six hundred sixty-eight thousand, three hundred eighty-nine".