43668821607 has 4 divisors (see below), whose sum is σ = 58225095480. Its totient is φ = 29112547736.

The previous prime is 43668821597. The next prime is 43668821617. The reversal of 43668821607 is 70612886634.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (43668821597) and next prime (43668821617).

It is a cyclic number.

It is not a de Polignac number, because 43668821607 - 2¹¹ = 43668819559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43668821607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43668821617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7278136932 + ... + 7278136937.

It is an arithmetic number, because the mean of its divisors is an integer number (14556273870).

Almost surely, 2^43668821607 is an apocalyptic number.

43668821607 is a deficient number, since it is larger than the sum of its proper divisors (14556273873).

43668821607 is a wasteful number, since it uses less digits than its factorization.

43668821607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14556273872.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 43668821607 in words is "forty-three billion, six hundred sixty-eight million, eight hundred twenty-one thousand, six hundred seven".