1691543310914 has 4 divisors (see below), whose sum is σ = 2537314966374. Its totient is φ = 845771655456.

The previous prime is 1691543310901. The next prime is 1691543310937. The reversal of 1691543310914 is 4190133451961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1335450650689 + 356092660225 = 1155617^2 + 596735^2 .

It is a super-2 number, since 2×1691543310914² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422885827727 + ... + 422885827730.

Almost surely, 2^{1691543310914} is an apocalyptic number.

1691543310914 is a deficient number, since it is larger than the sum of its proper divisors (845771655460).

1691543310914 is an equidigital number, since it uses as much as digits as its factorization.

1691543310914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845771655459.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 1691543310914 in words is "one trillion, six hundred ninety-one billion, five hundred forty-three million, three hundred ten thousand, nine hundred fourteen".