1646849443120 has 80 divisors (see below), whose sum is σ = 4606225539840. Its totient is φ = 534916507392.

The previous prime is 1646849443087. The next prime is 1646849443147. The reversal of 1646849443120 is 213449486461.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1646849443120² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77378902 + ... + 77400181.

It is an arithmetic number, because the mean of its divisors is an integer number (57577819248).

Almost surely, 2^{1646849443120} is an apocalyptic number.

1646849443120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646849443120 is an abundant number, since it is smaller than the sum of its proper divisors (2959376096720).

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

1646849443120 is a wasteful number, since it uses less digits than its factorization.

1646849443120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154779122 (or 154779116 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 1646849443120 in words is "one trillion, six hundred forty-six billion, eight hundred forty-nine million, four hundred forty-three thousand, one hundred twenty".