1643256053316 has 48 divisors (see below), whose sum is σ = 4261043404800. Its totient is φ = 547655597856.

The previous prime is 1643256053261. The next prime is 1643256053321. The reversal of 1643256053316 is 6133506523461.

1643256053316 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 2 + 5 + 605 + 3 + 31 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721476 + ... + 1951163.

It is an arithmetic number, because the mean of its divisors is an integer number (88771737600).

Almost surely, 2^{1643256053316} is an apocalyptic number.

It is an amenable number.

1643256053316 is an abundant number, since it is smaller than the sum of its proper divisors (2617787351484).

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

1643256053316 is a wasteful number, since it uses less digits than its factorization.

1643256053316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678345 (or 2678337 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 1643256053316 in words is "one trillion, six hundred forty-three billion, two hundred fifty-six million, fifty-three thousand, three hundred sixteen".