1646871828132 has 12 divisors (see below), whose sum is σ = 3842700932336. Its totient is φ = 548957276040.

The previous prime is 1646871828127. The next prime is 1646871828223. The reversal of 1646871828132 is 2318281786461.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68619659494 + ... + 68619659517.

Almost surely, 2^{1646871828132} is an apocalyptic number.

1646871828132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1646871828132 is an abundant number, since it is smaller than the sum of its proper divisors (2195829104204).

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

1646871828132 is a wasteful number, since it uses less digits than its factorization.

1646871828132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137239319018 (or 137239319016 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The spelling of 1646871828132 in words is "one trillion, six hundred forty-six billion, eight hundred seventy-one million, eight hundred twenty-eight thousand, one hundred thirty-two".