2540441364161 has 4 divisors (see below), whose sum is σ = 2674148804400. Its totient is φ = 2406733923924.

The previous prime is 2540441364103. The next prime is 2540441364187. The reversal of 2540441364161 is 1614631440452.

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-2540441364161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540441364101) 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, 66853720091 + ... + 66853720128.

It is an arithmetic number, because the mean of its divisors is an integer number (668537201100).

Almost surely, 2^{2540441364161} is an apocalyptic number.

It is an amenable number.

2540441364161 is a deficient number, since it is larger than the sum of its proper divisors (133707440239).

2540441364161 is a wasteful number, since it uses less digits than its factorization.

2540441364161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133707440238.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 2540441364161 in words is "two trillion, five hundred forty billion, four hundred forty-one million, three hundred sixty-four thousand, one hundred sixty-one".