1684378956108 has 24 divisors (see below), whose sum is σ = 3940587542080. Its totient is φ = 559978226640.

The previous prime is 1684378956107. The next prime is 1684378956181. The reversal of 1684378956108 is 8016598734861.

It is a happy number.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1684378956107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185173438 + ... + 185182533.

Almost surely, 2^{1684378956108} is an apocalyptic number.

It is an amenable number.

1684378956108 is an abundant number, since it is smaller than the sum of its proper divisors (2256208585972).

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

1684378956108 is a wasteful number, since it uses less digits than its factorization.

1684378956108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370356357 (or 370356355 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 66.

The spelling of 1684378956108 in words is "one trillion, six hundred eighty-four billion, three hundred seventy-eight million, nine hundred fifty-six thousand, one hundred eight".