2547341561 has 4 divisors (see below), whose sum is σ = 2547817572. Its totient is φ = 2546865552.

The previous prime is 2547341551. The next prime is 2547341569. The reversal of 2547341561 is 1651437452.

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 1864512400 + 682829161 = 43180^2 + 26131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2547341561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2547341569) 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, 229886 + ... + 240711.

It is an arithmetic number, because the mean of its divisors is an integer number (636954393).

Almost surely, 2^2547341561 is an apocalyptic number.

It is an amenable number.

2547341561 is a deficient number, since it is larger than the sum of its proper divisors (476011).

2547341561 is an equidigital number, since it uses as much as digits as its factorization.

2547341561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476010.

The product of its digits is 100800, while the sum is 38.

The square root of 2547341561 is about 50471.1953593334. The cubic root of 2547341561 is about 1365.7222780074.

The spelling of 2547341561 in words is "two billion, five hundred forty-seven million, three hundred forty-one thousand, five hundred sixty-one".