211612646023 has 4 divisors (see below), whose sum is σ = 211616885808. Its totient is φ = 211608406240.

The previous prime is 211612645963. The next prime is 211612646029. The reversal of 211612646023 is 320646216112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211612646023 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 211612646023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211612646029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2044123 + ... + 2145148.

It is an arithmetic number, because the mean of its divisors is an integer number (52904221452).

Almost surely, 2^211612646023 is an apocalyptic number.

211612646023 is a deficient number, since it is larger than the sum of its proper divisors (4239785).

211612646023 is an equidigital number, since it uses as much as digits as its factorization.

211612646023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239784.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 211612646023 in words is "two hundred eleven billion, six hundred twelve million, six hundred forty-six thousand, twenty-three".