8965490921993 has 4 divisors (see below), whose sum is σ = 8974667474580. Its totient is φ = 8956314369408.

The previous prime is 8965490921941. The next prime is 8965490922029. The reversal of 8965490921993 is 3991290945698.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3906896168569 + 5058594753424 = 1976587^2 + 2249132^2 .

It is a cyclic number.

It is not a de Polignac number, because 8965490921993 - 2¹⁶ = 8965490856457 is a prime.

It is a super-2 number, since 2×8965490921993² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8965490921993.

It is not an unprimeable number, because it can be changed into a prime (8965490920993) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4588274828 + ... + 4588276781.

It is an arithmetic number, because the mean of its divisors is an integer number (2243666868645).

Almost surely, 2^{8965490921993} is an apocalyptic number.

It is an amenable number.

8965490921993 is a deficient number, since it is larger than the sum of its proper divisors (9176552587).

8965490921993 is an equidigital number, since it uses as much as digits as its factorization.

8965490921993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176552586.

The product of its (nonzero) digits is 340122240, while the sum is 74.

The spelling of 8965490921993 in words is "eight trillion, nine hundred sixty-five billion, four hundred ninety million, nine hundred twenty-one thousand, nine hundred ninety-three".