43961158709 has 4 divisors (see below), whose sum is σ = 47342786316. Its totient is φ = 40579531104.

The previous prime is 43961158673. The next prime is 43961158711. The reversal of 43961158709 is 90785116934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90785116934 = 2 ⋅45392558467.

It can be written as a sum of positive squares in 2 ways, for example, as 8307411025 + 35653747684 = 91145^2 + 188822^2 .

It is a cyclic number.

It is not a de Polignac number, because 43961158709 - 2²⁸ = 43692723253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43961158309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1690813784 + ... + 1690813809.

It is an arithmetic number, because the mean of its divisors is an integer number (11835696579).

Almost surely, 2^43961158709 is an apocalyptic number.

It is an amenable number.

43961158709 is a deficient number, since it is larger than the sum of its proper divisors (3381627607).

43961158709 is a wasteful number, since it uses less digits than its factorization.

43961158709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381627606.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 43961158709 in words is "forty-three billion, nine hundred sixty-one million, one hundred fifty-eight thousand, seven hundred nine".