217668671002 has 4 divisors (see below), whose sum is σ = 326503006506. Its totient is φ = 108834335500.

The previous prime is 217668670991. The next prime is 217668671027. The reversal of 217668671002 is 200176866712.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 132335160841 + 85333510161 = 363779^2 + 292119^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54417167749 + ... + 54417167752.

Almost surely, 2^217668671002 is an apocalyptic number.

217668671002 is a deficient number, since it is larger than the sum of its proper divisors (108834335504).

217668671002 is a wasteful number, since it uses less digits than its factorization.

217668671002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108834335503.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 217668671002 in words is "two hundred seventeen billion, six hundred sixty-eight million, six hundred seventy-one thousand, two".