42043436565 has 32 divisors (see below), whose sum is σ = 73631703936. Its totient is φ = 20358984960.

The previous prime is 42043436527. The next prime is 42043436581. The reversal of 42043436565 is 56563434024.

It is a happy number.

It is not a de Polignac number, because 42043436565 - 2¹⁰ = 42043435541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1755379 + ... + 1779168.

It is an arithmetic number, because the mean of its divisors is an integer number (2300990748).

Almost surely, 2^42043436565 is an apocalyptic number.

It is an amenable number.

42043436565 is a deficient number, since it is larger than the sum of its proper divisors (31588267371).

42043436565 is a wasteful number, since it uses less digits than its factorization.

42043436565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534629.

The product of its (nonzero) digits is 1036800, while the sum is 42.

The spelling of 42043436565 in words is "forty-two billion, forty-three million, four hundred thirty-six thousand, five hundred sixty-five".