42340555516661 has 4 divisors (see below), whose sum is σ = 42340698541824. Its totient is φ = 42340412491500.

The previous prime is 42340555516639. The next prime is 42340555516673. The reversal of 42340555516661 is 16661555504324.

42340555516661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42340555516661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42340555516601) 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, 71067605 + ... + 71660906.

It is an arithmetic number, because the mean of its divisors is an integer number (10585174635456).

Almost surely, 2^{42340555516661} is an apocalyptic number.

It is an amenable number.

42340555516661 is a deficient number, since it is larger than the sum of its proper divisors (143025163).

42340555516661 is a wasteful number, since it uses less digits than its factorization.

42340555516661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143025162.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 42340555516661 in words is "forty-two trillion, three hundred forty billion, five hundred fifty-five million, five hundred sixteen thousand, six hundred sixty-one".