105638818664 has 8 divisors (see below), whose sum is σ = 198072785010. Its totient is φ = 52819409328.

The previous prime is 105638818661. The next prime is 105638818667. The reversal of 105638818664 is 466818836501.

It is an interprime number because it is at equal distance from previous prime (105638818661) and next prime (105638818667).

It can be written as a sum of positive squares in only one way, i.e., 95746924900 + 9891893764 = 309430^2 + 99458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×105638818664² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105638818661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6602426159 + ... + 6602426174.

Almost surely, 2^105638818664 is an apocalyptic number.

It is an amenable number.

105638818664 is a deficient number, since it is larger than the sum of its proper divisors (92433966346).

105638818664 is a wasteful number, since it uses less digits than its factorization.

105638818664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13204852339 (or 13204852335 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 105638818664 in words is "one hundred five billion, six hundred thirty-eight million, eight hundred eighteen thousand, six hundred sixty-four".