2005668740541 has 4 divisors (see below), whose sum is σ = 2674224987392. Its totient is φ = 1337112493692.

The previous prime is 2005668740539. The next prime is 2005668740549. The reversal of 2005668740541 is 1450478665002.

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 not a de Polignac number, because 2005668740541 - 2¹ = 2005668740539 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 (2005668740549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334278123421 + ... + 334278123426.

It is an arithmetic number, because the mean of its divisors is an integer number (668556246848).

Almost surely, 2^{2005668740541} is an apocalyptic number.

It is an amenable number.

2005668740541 is a deficient number, since it is larger than the sum of its proper divisors (668556246851).

2005668740541 is an equidigital number, since it uses as much as digits as its factorization.

2005668740541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668556246850.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 2005668740541 in words is "two trillion, five billion, six hundred sixty-eight million, seven hundred forty thousand, five hundred forty-one".