43661006064990 has 48 divisors (see below), whose sum is σ = 113525398132848. Its totient is φ = 11642239323648.

The previous prime is 43661006064979. The next prime is 43661006065009. The reversal of 43661006064990 is 9946060016634.

43661006064990 is a `hidden beast` number, since 4 + 36 + 61 + 0 + 0 + 60 + 6 + 499 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12976627 + ... + 15991086.

It is an arithmetic number, because the mean of its divisors is an integer number (2365112461101).

Almost surely, 2^{43661006064990} is an apocalyptic number.

43661006064990 is an abundant number, since it is smaller than the sum of its proper divisors (69864392067858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43661006064990 is a wasteful number, since it uses less digits than its factorization.

43661006064990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28984473 (or 28984470 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 43661006064990 in words is "forty-three trillion, six hundred sixty-one billion, six million, sixty-four thousand, nine hundred ninety".