1646646144120 has 96 divisors (see below), whose sum is σ = 5442305122800. Its totient is φ = 431663164416.

The previous prime is 1646646144119. The next prime is 1646646144133. The reversal of 1646646144120 is 214416466461.

1646646144120 is a `hidden beast` number, since 1 + 6 + 4 + 6 + 6 + 4 + 614 + 4 + 1 + 20 = 666.

It is a super-2 number, since 2×1646646144120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38741617 + ... + 38784096.

Almost surely, 2^{1646646144120} is an apocalyptic number.

1646646144120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646646144120 is an abundant number, since it is smaller than the sum of its proper divisors (3795658978680).

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

1646646144120 is a wasteful number, since it uses less digits than its factorization.

1646646144120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77525789 (or 77525782 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 1646646144120 in words is "one trillion, six hundred forty-six billion, six hundred forty-six million, one hundred forty-four thousand, one hundred twenty".