442897217668 has 6 divisors (see below), whose sum is σ = 775070130926. Its totient is φ = 221448608832.

The previous prime is 442897217639. The next prime is 442897217717. The reversal of 442897217668 is 866712798244.

It can be written as a sum of positive squares in only one way, i.e., 441544302144 + 1352915524 = 664488^2 + 36782^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55362152205 + ... + 55362152212.

Almost surely, 2^442897217668 is an apocalyptic number.

It is an amenable number.

442897217668 is a deficient number, since it is larger than the sum of its proper divisors (332172913258).

442897217668 is a wasteful number, since it uses less digits than its factorization.

442897217668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110724304421 (or 110724304419 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 64.

The spelling of 442897217668 in words is "four hundred forty-two billion, eight hundred ninety-seven million, two hundred seventeen thousand, six hundred sixty-eight".