2541279691729 has 4 divisors (see below), whose sum is σ = 2541285189540. Its totient is φ = 2541274193920.

The previous prime is 2541279691703. The next prime is 2541279691733. The reversal of 2541279691729 is 9271969721452.

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 1461390854400 + 1079888837329 = 1208880^2 + 1039177^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541279691729 - 2⁹ = 2541279691217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2541279691739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984744 + ... + 3003625.

It is an arithmetic number, because the mean of its divisors is an integer number (635321297385).

Almost surely, 2^{2541279691729} is an apocalyptic number.

It is an amenable number.

2541279691729 is a deficient number, since it is larger than the sum of its proper divisors (5497811).

2541279691729 is an equidigital number, since it uses as much as digits as its factorization.

2541279691729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497810.

The product of its digits is 34292160, while the sum is 64.

The spelling of 2541279691729 in words is "two trillion, five hundred forty-one billion, two hundred seventy-nine million, six hundred ninety-one thousand, seven hundred twenty-nine".