43540566660123 has 16 divisors (see below), whose sum is σ = 62623814328096. Its totient is φ = 26749612166400.

The previous prime is 43540566660119. The next prime is 43540566660133. The reversal of 43540566660123 is 32106666504534.

It is not a de Polignac number, because 43540566660123 - 2² = 43540566660119 is a prime.

It is a super-2 number, since 2×43540566660123² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43540566660133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928782540 + ... + 928829417.

It is an arithmetic number, because the mean of its divisors is an integer number (3913988395506).

Almost surely, 2^{43540566660123} is an apocalyptic number.

43540566660123 is a deficient number, since it is larger than the sum of its proper divisors (19083247667973).

43540566660123 is a wasteful number, since it uses less digits than its factorization.

43540566660123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857612574.

The product of its (nonzero) digits is 9331200, while the sum is 51.

The spelling of 43540566660123 in words is "forty-three trillion, five hundred forty billion, five hundred sixty-six million, six hundred sixty thousand, one hundred twenty-three".