2730766436561 has 4 divisors (see below), whose sum is σ = 2731000226724. Its totient is φ = 2730532646400.

The previous prime is 2730766436543. The next prime is 2730766436581. The reversal of 2730766436561 is 1656346670372.

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 1953618402961 + 777148033600 = 1397719^2 + 881560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2730766436561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2730766436497 and 2730766436506.

It is not an unprimeable number, because it can be changed into a prime (2730766436581) 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, 116877560 + ... + 116900921.

It is an arithmetic number, because the mean of its divisors is an integer number (682750056681).

Almost surely, 2^{2730766436561} is an apocalyptic number.

It is an amenable number.

2730766436561 is a deficient number, since it is larger than the sum of its proper divisors (233790163).

2730766436561 is a wasteful number, since it uses less digits than its factorization.

2730766436561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233790162.

The product of its (nonzero) digits is 22861440, while the sum is 56.

The spelling of 2730766436561 in words is "two trillion, seven hundred thirty billion, seven hundred sixty-six million, four hundred thirty-six thousand, five hundred sixty-one".