42775514861 has 4 divisors (see below), whose sum is σ = 43361480892. Its totient is φ = 42189548832.

The previous prime is 42775514843. The next prime is 42775514897. The reversal of 42775514861 is 16841557724.

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 24525126025 + 18250388836 = 156605^2 + 135094^2 .

It is a cyclic number.

It is not a de Polignac number, because 42775514861 - 2³⁰ = 41701773037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42775514161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292982906 + ... + 292983051.

It is an arithmetic number, because the mean of its divisors is an integer number (10840370223).

Almost surely, 2^42775514861 is an apocalyptic number.

It is an amenable number.

42775514861 is a deficient number, since it is larger than the sum of its proper divisors (585966031).

42775514861 is an equidigital number, since it uses as much as digits as its factorization.

42775514861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585966030.

The product of its digits is 1881600, while the sum is 50.

The spelling of 42775514861 in words is "forty-two billion, seven hundred seventy-five million, five hundred fourteen thousand, eight hundred sixty-one".