105664894637 has 4 divisors (see below), whose sum is σ = 105666373596. Its totient is φ = 105663415680.

The previous prime is 105664894583. The next prime is 105664894649. The reversal of 105664894637 is 736498466501.

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 89416548676 + 16248345961 = 299026^2 + 127469^2 .

It is a cyclic number.

It is not a de Polignac number, because 105664894637 - 2³² = 101369927341 is a prime.

It is a super-2 number, since 2×105664894637² (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 (105664893637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626564 + ... + 777117.

It is an arithmetic number, because the mean of its divisors is an integer number (26416593399).

Almost surely, 2^105664894637 is an apocalyptic number.

It is an amenable number.

105664894637 is a deficient number, since it is larger than the sum of its proper divisors (1478959).

105664894637 is an equidigital number, since it uses as much as digits as its factorization.

105664894637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478958.

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 105664894637 in words is "one hundred five billion, six hundred sixty-four million, eight hundred ninety-four thousand, six hundred thirty-seven".