123566214643 has 4 divisors (see below), whose sum is σ = 123567205968. Its totient is φ = 123565223320.

The previous prime is 123566214641. The next prime is 123566214649. The reversal of 123566214643 is 346412665321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 123566214643 - 2¹ = 123566214641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123566214643.

It is not an unprimeable number, because it can be changed into a prime (123566214641) 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, 276343 + ... + 568768.

It is an arithmetic number, because the mean of its divisors is an integer number (30891801492).

Almost surely, 2^123566214643 is an apocalyptic number.

123566214643 is a deficient number, since it is larger than the sum of its proper divisors (991325).

123566214643 is an equidigital number, since it uses as much as digits as its factorization.

123566214643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991324.

The product of its digits is 622080, while the sum is 43.

Adding to 123566214643 its reverse (346412665321), we get a palindrome (469978879964).

The spelling of 123566214643 in words is "one hundred twenty-three billion, five hundred sixty-six million, two hundred fourteen thousand, six hundred forty-three".