2741664434561 has 4 divisors (see below), whose sum is σ = 2952561698772. Its totient is φ = 2530767170352.

The previous prime is 2741664434557. The next prime is 2741664434563. The reversal of 2741664434561 is 1654344661472.

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 911488368961 + 1830176065600 = 954719^2 + 1352840^2 .

It is a cyclic number.

It is not a de Polignac number, because 2741664434561 - 2² = 2741664434557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2741664434563) 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, 105448632086 + ... + 105448632111.

It is an arithmetic number, because the mean of its divisors is an integer number (738140424693).

Almost surely, 2^{2741664434561} is an apocalyptic number.

It is an amenable number.

2741664434561 is a deficient number, since it is larger than the sum of its proper divisors (210897264211).

2741664434561 is a wasteful number, since it uses less digits than its factorization.

2741664434561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210897264210.

The product of its digits is 11612160, while the sum is 53.

The spelling of 2741664434561 in words is "two trillion, seven hundred forty-one billion, six hundred sixty-four million, four hundred thirty-four thousand, five hundred sixty-one".