42111307775165 has 4 divisors (see below), whose sum is σ = 50533569330204. Its totient is φ = 33689046220128.

The previous prime is 42111307775099. The next prime is 42111307775179. The reversal of 42111307775165 is 56157770311124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33233357166244 + 8877950608921 = 5764838^2 + 2979589^2 .

It is a cyclic number.

It is not a de Polignac number, because 42111307775165 - 2⁸ = 42111307774909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4211130777512 + ... + 4211130777521.

It is an arithmetic number, because the mean of its divisors is an integer number (12633392332551).

Almost surely, 2^{42111307775165} is an apocalyptic number.

It is an amenable number.

42111307775165 is a deficient number, since it is larger than the sum of its proper divisors (8422261555039).

42111307775165 is an equidigital number, since it uses as much as digits as its factorization.

42111307775165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8422261555038.

The product of its (nonzero) digits is 1234800, while the sum is 50.

The spelling of 42111307775165 in words is "forty-two trillion, one hundred eleven billion, three hundred seven million, seven hundred seventy-five thousand, one hundred sixty-five".