2165410015643 has 4 divisors (see below), whose sum is σ = 2474754303600. Its totient is φ = 1856065727688.

The previous prime is 2165410015633. The next prime is 2165410015661. The reversal of 2165410015643 is 3465100145612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2165410015643 - 2³² = 2161115048347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165410015597 and 2165410015606.

It is not an unprimeable number, because it can be changed into a prime (2165410015633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154672143968 + ... + 154672143981.

It is an arithmetic number, because the mean of its divisors is an integer number (618688575900).

Almost surely, 2^{2165410015643} is an apocalyptic number.

2165410015643 is a deficient number, since it is larger than the sum of its proper divisors (309344287957).

2165410015643 is an equidigital number, since it uses as much as digits as its factorization.

2165410015643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309344287956.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 2165410015643 in words is "two trillion, one hundred sixty-five billion, four hundred ten million, fifteen thousand, six hundred forty-three".