2116645301623 has 4 divisors (see below), whose sum is σ = 2119047851088. Its totient is φ = 2114242752160.

The previous prime is 2116645301581. The next prime is 2116645301657. The reversal of 2116645301623 is 3261035466112.

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 2116645301623 - 2³³ = 2108055367031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116645302623) 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, 1201273411 + ... + 1201275172.

It is an arithmetic number, because the mean of its divisors is an integer number (529761962772).

Almost surely, 2^{2116645301623} is an apocalyptic number.

2116645301623 is a deficient number, since it is larger than the sum of its proper divisors (2402549465).

2116645301623 is an equidigital number, since it uses as much as digits as its factorization.

2116645301623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402549464.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 2116645301623 in words is "two trillion, one hundred sixteen billion, six hundred forty-five million, three hundred one thousand, six hundred twenty-three".