2741221733561 has 4 divisors (see below), whose sum is σ = 2741226348624. Its totient is φ = 2741217118500.

The previous prime is 2741221733519. The next prime is 2741221733599. The reversal of 2741221733561 is 1653371221472.

It is a happy number.

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-2741221733561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2741221730561) 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, 1257215 + ... + 2657636.

It is an arithmetic number, because the mean of its divisors is an integer number (685306587156).

Almost surely, 2^{2741221733561} is an apocalyptic number.

It is an amenable number.

2741221733561 is a deficient number, since it is larger than the sum of its proper divisors (4615063).

2741221733561 is an equidigital number, since it uses as much as digits as its factorization.

2741221733561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615062.

The product of its digits is 423360, while the sum is 44.

The spelling of 2741221733561 in words is "two trillion, seven hundred forty-one billion, two hundred twenty-one million, seven hundred thirty-three thousand, five hundred sixty-one".