43671905668 has 6 divisors (see below), whose sum is σ = 76425834926. Its totient is φ = 21835952832.

The previous prime is 43671905603. The next prime is 43671905689. The reversal of 43671905668 is 86650917634.

It can be written as a sum of positive squares in only one way, i.e., 43630018884 + 41886784 = 208878^2 + 6472^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5458988205 + ... + 5458988212.

Almost surely, 2^43671905668 is an apocalyptic number.

It is an amenable number.

43671905668 is a deficient number, since it is larger than the sum of its proper divisors (32753929258).

43671905668 is a wasteful number, since it uses less digits than its factorization.

43671905668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10917976421 (or 10917976419 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

It can be divided in two parts, 4367 and 1905668, that added together give a triangular number (1910035 = T₁₉₅₄).

The spelling of 43671905668 in words is "forty-three billion, six hundred seventy-one million, nine hundred five thousand, six hundred sixty-eight".