43661006064989 has 16 divisors (see below), whose sum is σ = 46635541562880. Its totient is φ = 40755272912640.

The previous prime is 43661006064979. The next prime is 43661006065009. The reversal of 43661006064989 is 98946060016634.

It is a cyclic number.

It is not a de Polignac number, because 43661006064989 - 2¹⁶ = 43661005999453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43661006064979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14507792 + ... + 17256825.

It is an arithmetic number, because the mean of its divisors is an integer number (2914721347680).

Almost surely, 2^{43661006064989} is an apocalyptic number.

It is an amenable number.

43661006064989 is a deficient number, since it is larger than the sum of its proper divisors (2974535497891).

43661006064989 is a wasteful number, since it uses less digits than its factorization.

43661006064989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31765700.

The product of its (nonzero) digits is 40310784, while the sum is 62.

The spelling of 43661006064989 in words is "forty-three trillion, six hundred sixty-one billion, six million, sixty-four thousand, nine hundred eighty-nine".