1691543310912 has 1344 divisors, whose sum is σ = 6518227881984. Its totient is φ = 422725754880.

The previous prime is 1691543310901. The next prime is 1691543310937. The reversal of 1691543310912 is 2190133451961.

1691543310912 is a `hidden beast` number, since 1 + 6 + 9 + 1 + 543 + 3 + 10 + 91 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a super-2 number, since 2×1691543310912² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5110402587 + ... + 5110402917.

It is an arithmetic number, because the mean of its divisors is an integer number (4849871936).

Almost surely, 2^{1691543310912} is an apocalyptic number.

1691543310912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1691543310912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3259113940992).

1691543310912 is an abundant number, since it is smaller than the sum of its proper divisors (4826684571072).

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

1691543310912 is a wasteful number, since it uses less digits than its factorization.

1691543310912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 1691543310912 in words is "one trillion, six hundred ninety-one billion, five hundred forty-three million, three hundred ten thousand, nine hundred twelve".