2012656623 has 4 divisors (see below), whose sum is σ = 2683542168. Its totient is φ = 1341771080.

The previous prime is 2012656619. The next prime is 2012656651. The reversal of 2012656623 is 3266562102.

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 2012656623 - 2² = 2012656619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012656123) 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, 335442768 + ... + 335442773.

It is an arithmetic number, because the mean of its divisors is an integer number (670885542).

Almost surely, 2^2012656623 is an apocalyptic number.

2012656623 is a deficient number, since it is larger than the sum of its proper divisors (670885545).

2012656623 is an equidigital number, since it uses as much as digits as its factorization.

2012656623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670885544.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2012656623 is about 44862.6417300631. The cubic root of 2012656623 is about 1262.5731875097.

The spelling of 2012656623 in words is "two billion, twelve million, six hundred fifty-six thousand, six hundred twenty-three".