43868657665 has 16 divisors (see below), whose sum is σ = 61442790912. Its totient is φ = 29441335104.

The previous prime is 43868657653. The next prime is 43868657681. The reversal of 43868657665 is 56675686834.

It is a cyclic number.

It is not a de Polignac number, because 43868657665 - 2⁹ = 43868657153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43868657597 and 43868657606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13332294 + ... + 13335583.

It is an arithmetic number, because the mean of its divisors is an integer number (3840174432).

Almost surely, 2^43868657665 is an apocalyptic number.

It is an amenable number.

43868657665 is a deficient number, since it is larger than the sum of its proper divisors (17574133247).

43868657665 is a wasteful number, since it uses less digits than its factorization.

43868657665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26667936.

The product of its digits is 174182400, while the sum is 64.

The spelling of 43868657665 in words is "forty-three billion, eight hundred sixty-eight million, six hundred fifty-seven thousand, six hundred sixty-five".