43117646661 has 12 divisors (see below), whose sum is σ = 62305960288. Its totient is φ = 28733598504.

The previous prime is 43117646653. The next prime is 43117646717. The reversal of 43117646661 is 16664671134.

It is not a de Polignac number, because 43117646661 - 2³ = 43117646653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43117646641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934495 + ... + 979548.

Almost surely, 2^43117646661 is an apocalyptic number.

It is an amenable number.

43117646661 is a deficient number, since it is larger than the sum of its proper divisors (19188313627).

43117646661 is a wasteful number, since it uses less digits than its factorization.

43117646661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916552 (or 1916549 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The spelling of 43117646661 in words is "forty-three billion, one hundred seventeen million, six hundred forty-six thousand, six hundred sixty-one".