2165601650559 has 16 divisors (see below), whose sum is σ = 2950845004800. Its totient is φ = 1412381689056.

The previous prime is 2165601650557. The next prime is 2165601650581. The reversal of 2165601650559 is 9550561065612.

It is not a de Polignac number, because 2165601650559 - 2¹ = 2165601650557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165601650557) 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, 41889579 + ... + 41941244.

It is an arithmetic number, because the mean of its divisors is an integer number (184427812800).

Almost surely, 2^{2165601650559} is an apocalyptic number.

2165601650559 is a deficient number, since it is larger than the sum of its proper divisors (785243354241).

2165601650559 is a wasteful number, since it uses less digits than its factorization.

2165601650559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83831014.

The product of its (nonzero) digits is 2430000, while the sum is 51.

The spelling of 2165601650559 in words is "two trillion, one hundred sixty-five billion, six hundred one million, six hundred fifty thousand, five hundred fifty-nine".