1678217989116 has 24 divisors (see below), whose sum is σ = 4011350316624. Its totient is φ = 545761947520.

The previous prime is 1678217989081. The next prime is 1678217989181. The reversal of 1678217989116 is 6119897128761.

It is a super-2 number, since 2×1678217989116² (a number of 25 digits) contains 22 as substring.

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, 1705505595 + ... + 1705506578.

It is an arithmetic number, because the mean of its divisors is an integer number (167139596526).

Almost surely, 2^{1678217989116} is an apocalyptic number.

It is an amenable number.

1678217989116 is an abundant number, since it is smaller than the sum of its proper divisors (2333132327508).

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

1678217989116 is a wasteful number, since it uses less digits than its factorization.

1678217989116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411012221 (or 3411012219 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 66.

The spelling of 1678217989116 in words is "one trillion, six hundred seventy-eight billion, two hundred seventeen million, nine hundred eighty-nine thousand, one hundred sixteen".