42361561505 has 4 divisors (see below), whose sum is σ = 50833873812. Its totient is φ = 33889249200.

The previous prime is 42361561477. The next prime is 42361561519. The reversal of 42361561505 is 50516516324.

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 33825095056 + 8536466449 = 183916^2 + 92393^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42361561505 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4236156146 + ... + 4236156155.

It is an arithmetic number, because the mean of its divisors is an integer number (12708468453).

Almost surely, 2^42361561505 is an apocalyptic number.

It is an amenable number.

42361561505 is a deficient number, since it is larger than the sum of its proper divisors (8472312307).

42361561505 is an equidigital number, since it uses as much as digits as its factorization.

42361561505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472312306.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 42361561505 in words is "forty-two billion, three hundred sixty-one million, five hundred sixty-one thousand, five hundred five".