4541761571561 has 4 divisors (see below), whose sum is σ = 4541909788500. Its totient is φ = 4541613354624.

The previous prime is 4541761571549. The next prime is 4541761571563. The reversal of 4541761571561 is 1651751671454.

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 1113487137961 + 3428274433600 = 1055219^2 + 1851560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4541761571561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4541761571563) 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, 74062496 + ... + 74123793.

It is an arithmetic number, because the mean of its divisors is an integer number (1135477447125).

Almost surely, 2^{4541761571561} is an apocalyptic number.

It is an amenable number.

4541761571561 is a deficient number, since it is larger than the sum of its proper divisors (148216939).

4541761571561 is a wasteful number, since it uses less digits than its factorization.

4541761571561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148216938.

The product of its digits is 3528000, while the sum is 53.

The spelling of 4541761571561 in words is "four trillion, five hundred forty-one billion, seven hundred sixty-one million, five hundred seventy-one thousand, five hundred sixty-one".