2725869922561 has 4 divisors (see below), whose sum is σ = 2726158720000. Its totient is φ = 2725581125124.

The previous prime is 2725869922549. The next prime is 2725869922679. The reversal of 2725869922561 is 1652299685272.

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 not a de Polignac number, because 2725869922561 - 2¹¹ = 2725869920513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2725869922493 and 2725869922502.

It is not an unprimeable number, because it can be changed into a prime (2725869922511) 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, 144384561 + ... + 144403438.

It is an arithmetic number, because the mean of its divisors is an integer number (681539680000).

Almost surely, 2^{2725869922561} is an apocalyptic number.

It is an amenable number.

2725869922561 is a deficient number, since it is larger than the sum of its proper divisors (288797439).

2725869922561 is an equidigital number, since it uses as much as digits as its factorization.

2725869922561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288797438.

The product of its digits is 65318400, while the sum is 64.

The spelling of 2725869922561 in words is "two trillion, seven hundred twenty-five billion, eight hundred sixty-nine million, nine hundred twenty-two thousand, five hundred sixty-one".