43790166121 has 9 divisors (see below), whose sum is σ = 47420699781. Its totient is φ = 40419180672.

The previous prime is 43790166103. The next prime is 43790166127. The reversal of 43790166121 is 12166109734.

The square root of 43790166121 is 209261.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4165282521 + 39624883600 = 64539^2 + 199060^2 .

It is not a de Polignac number, because 43790166121 - 2⁵ = 43790166089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43790166127) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2712345 + ... + 2728441.

Almost surely, 2^43790166121 is an apocalyptic number.

43790166121 is the 209261-st square number.

43790166121 is the 104631-st centered octagonal number.

It is an amenable number.

43790166121 is a deficient number, since it is larger than the sum of its proper divisors (3630533660).

43790166121 is an frugal number, since it uses more digits than its factorization.

43790166121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32220 (or 16110 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 43790166121 in words is "forty-three billion, seven hundred ninety million, one hundred sixty-six thousand, one hundred twenty-one".