2165601650560 has 128 divisors (see below), whose sum is σ = 5625417830400. Its totient is φ = 794176358400.

The previous prime is 2165601650557. The next prime is 2165601650581. The reversal of 2165601650560 is 650561065612.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-4 number, since 4×2165601650560⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2495496 + ... + 3249415.

It is an arithmetic number, because the mean of its divisors is an integer number (43948576800).

Almost surely, 2^{2165601650560} is an apocalyptic number.

2165601650560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165601650560 is an abundant number, since it is smaller than the sum of its proper divisors (3459816179840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165601650560 is a wasteful number, since it uses less digits than its factorization.

2165601650560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744980 (or 5744968 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 2165601650560 in words is "two trillion, one hundred sixty-five billion, six hundred one million, six hundred fifty thousand, five hundred sixty".