4280744327561 has 4 divisors (see below), whose sum is σ = 4610032352772. Its totient is φ = 3951456302352.

The previous prime is 4280744327549. The next prime is 4280744327567. The reversal of 4280744327561 is 1657234470824.

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 2061001913161 + 2219742414400 = 1435619^2 + 1489880^2 .

It is not a de Polignac number, because 4280744327561 - 2³⁰ = 4279670585737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4280744327567) 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, 164644012586 + ... + 164644012611.

It is an arithmetic number, because the mean of its divisors is an integer number (1152508088193).

Almost surely, 2^{4280744327561} is an apocalyptic number.

It is an amenable number.

4280744327561 is a deficient number, since it is larger than the sum of its proper divisors (329288025211).

4280744327561 is a wasteful number, since it uses less digits than its factorization.

4280744327561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329288025210.

The product of its (nonzero) digits is 9031680, while the sum is 53.

The spelling of 4280744327561 in words is "four trillion, two hundred eighty billion, seven hundred forty-four million, three hundred twenty-seven thousand, five hundred sixty-one".