3553360633561 has 2 divisors, whose sum is σ = 3553360633562. Its totient is φ = 3553360633560.

The previous prime is 3553360633541. The next prime is 3553360633573. The reversal of 3553360633561 is 1653360633553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2491760117961 + 1061600515600 = 1578531^2 + 1030340^2 .

It is an emirp because it is prime and its reverse (1653360633553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3553360633561 - 2³⁹ = 3003604819673 is a prime.

It is not a weakly prime, because it can be changed into another prime (3553360633531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1776680316780 + 1776680316781.

It is an arithmetic number, because the mean of its divisors is an integer number (1776680316781).

Almost surely, 2^{3553360633561} is an apocalyptic number.

It is an amenable number.

3553360633561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3553360633561 is an equidigital number, since it uses as much as digits as its factorization.

3553360633561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561000, while the sum is 49.

The spelling of 3553360633561 in words is "three trillion, five hundred fifty-three billion, three hundred sixty million, six hundred thirty-three thousand, five hundred sixty-one".