212644666647608 has 48 divisors (see below), whose sum is σ = 440106734752440. Its totient is φ = 95749943627520.

The previous prime is 212644666647607. The next prime is 212644666647659. The reversal of 212644666647608 is 806746666446212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212644666647607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 607993010 + ... + 608342657.

Almost surely, 2^{212644666647608} is an apocalyptic number.

It is an amenable number.

212644666647608 is an abundant number, since it is smaller than the sum of its proper divisors (227462068104832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212644666647608 is a wasteful number, since it uses less digits than its factorization.

212644666647608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216335768 (or 1216335723 counting only the distinct ones).

The product of its (nonzero) digits is 668860416, while the sum is 68.

The spelling of 212644666647608 in words is "two hundred twelve trillion, six hundred forty-four billion, six hundred sixty-six million, six hundred forty-seven thousand, six hundred eight".