2366405561 has 4 divisors (see below), whose sum is σ = 2548436772. Its totient is φ = 2184374352.

The previous prime is 2366405557. The next prime is 2366405599. The reversal of 2366405561 is 1655046632.

It is a happy number.

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 517835536 + 1848570025 = 22756^2 + 42995^2 .

It is a cyclic number.

It is not a de Polignac number, because 2366405561 - 2² = 2366405557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2366495561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91015586 + ... + 91015611.

It is an arithmetic number, because the mean of its divisors is an integer number (637109193).

Almost surely, 2^2366405561 is an apocalyptic number.

It is an amenable number.

2366405561 is a deficient number, since it is larger than the sum of its proper divisors (182031211).

2366405561 is a wasteful number, since it uses less digits than its factorization.

2366405561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182031210.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 2366405561 is about 48645.7147239096. The cubic root of 2366405561 is about 1332.5895167062.

The spelling of 2366405561 in words is "two billion, three hundred sixty-six million, four hundred five thousand, five hundred sixty-one".