2042341255661 has 6 divisors (see below), whose sum is σ = 2375784726030. Its totient is φ = 1750578219096.

The previous prime is 2042341255649. The next prime is 2042341255667. The reversal of 2042341255661 is 1665521432402.

It can be written as a sum of positive squares in only one way, i.e., 1918416134761 + 123925120900 = 1385069^2 + 352030^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2042341255661 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 (2042341255667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20840216846 + ... + 20840216943.

It is an arithmetic number, because the mean of its divisors is an integer number (395964121005).

Almost surely, 2^{2042341255661} is an apocalyptic number.

It is an amenable number.

2042341255661 is a deficient number, since it is larger than the sum of its proper divisors (333443470369).

2042341255661 is an equidigital number, since it uses as much as digits as its factorization.

2042341255661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41680433803 (or 41680433796 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 2042341255661 in words is "two trillion, forty-two billion, three hundred forty-one million, two hundred fifty-five thousand, six hundred sixty-one".