1646896878216 has 96 divisors (see below), whose sum is σ = 4695618470400. Its totient is φ = 520015351680.

The previous prime is 1646896878199. The next prime is 1646896878227. The reversal of 1646896878216 is 6128786986461.

1646896878216 is a `hidden beast` number, since 1 + 6 + 468 + 9 + 6 + 87 + 82 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 13332610 + ... + 13455566.

It is an arithmetic number, because the mean of its divisors is an integer number (48912692400).

Almost surely, 2^{1646896878216} is an apocalyptic number.

It is an amenable number.

1646896878216 is an abundant number, since it is smaller than the sum of its proper divisors (3048721592184).

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

1646896878216 is a wasteful number, since it uses less digits than its factorization.

1646896878216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132779 (or 132772 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

The spelling of 1646896878216 in words is "one trillion, six hundred forty-six billion, eight hundred ninety-six million, eight hundred seventy-eight thousand, two hundred sixteen".