43438490961 has 8 divisors (see below), whose sum is σ = 57952738464. Its totient is φ = 28941618720.

The previous prime is 43438490959. The next prime is 43438490993. The reversal of 43438490961 is 16909483434.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43438490961 - 2¹ = 43438490959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43438490261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4337980 + ... + 4347981.

It is an arithmetic number, because the mean of its divisors is an integer number (7244092308).

Almost surely, 2^43438490961 is an apocalyptic number.

It is an amenable number.

43438490961 is a deficient number, since it is larger than the sum of its proper divisors (14514247503).

43438490961 is a wasteful number, since it uses less digits than its factorization.

43438490961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8687631.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 43438490961 in words is "forty-three billion, four hundred thirty-eight million, four hundred ninety thousand, nine hundred sixty-one".