2365505561 has 16 divisors (see below), whose sum is σ = 2476389888. Its totient is φ = 2256902400.

The previous prime is 2365505557. The next prime is 2365505563. The reversal of 2365505561 is 1655055632.

It is a cyclic number.

It is not a de Polignac number, because 2365505561 - 2² = 2365505557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2365505563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2420705 + ... + 2421681.

It is an arithmetic number, because the mean of its divisors is an integer number (154774368).

Almost surely, 2^2365505561 is an apocalyptic number.

It is an amenable number.

2365505561 is a deficient number, since it is larger than the sum of its proper divisors (110884327).

2365505561 is an equidigital number, since it uses as much as digits as its factorization.

2365505561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 2365505561 is about 48636.4632863040. The cubic root of 2365505561 is about 1332.4205568483.

It can be divided in two parts, 2 and 365505561, that added together give a palindrome (365505563).

The spelling of 2365505561 in words is "two billion, three hundred sixty-five million, five hundred five thousand, five hundred sixty-one".