2217656067672 has 32 divisors (see below), whose sum is σ = 5553987698880. Its totient is φ = 737905685280.

The previous prime is 2217656067629. The next prime is 2217656067707. The reversal of 2217656067672 is 2767606567122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82048954 + ... + 82075977.

It is an arithmetic number, because the mean of its divisors is an integer number (173562115590).

Almost surely, 2^{2217656067672} is an apocalyptic number.

It is an amenable number.

2217656067672 is an abundant number, since it is smaller than the sum of its proper divisors (3336331631208).

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

2217656067672 is a wasteful number, since it uses less digits than its factorization.

2217656067672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164125503 (or 164125499 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 57.

The spelling of 2217656067672 in words is "two trillion, two hundred seventeen billion, six hundred fifty-six million, sixty-seven thousand, six hundred seventy-two".