1640017913791 has 2 divisors, whose sum is σ = 1640017913792. Its totient is φ = 1640017913790.

The previous prime is 1640017913777. The next prime is 1640017913857. The reversal of 1640017913791 is 1973197100461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640017913791 - 2¹⁵ = 1640017881023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640017913701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820008956895 + 820008956896.

It is an arithmetic number, because the mean of its divisors is an integer number (820008956896).

Almost surely, 2^{1640017913791} is an apocalyptic number.

1640017913791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640017913791 is an equidigital number, since it uses as much as digits as its factorization.

1640017913791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 1640017913791 in words is "one trillion, six hundred forty billion, seventeen million, nine hundred thirteen thousand, seven hundred ninety-one".