1026668648209 has 4 divisors (see below), whose sum is σ = 1080703840240. Its totient is φ = 972633456180.

The previous prime is 1026668648207. The next prime is 1026668648219. The reversal of 1026668648209 is 9028468666201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1026668648209 - 2¹ = 1026668648207 is a prime.

It is a super-4 number, since 4×1026668648209⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1026668648207) 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, 27017595987 + ... + 27017596024.

It is an arithmetic number, because the mean of its divisors is an integer number (270175960060).

Almost surely, 2^{1026668648209} is an apocalyptic number.

1026668648209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1026668648209 is a deficient number, since it is larger than the sum of its proper divisors (54035192031).

1026668648209 is an equidigital number, since it uses as much as digits as its factorization.

1026668648209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54035192030.

The product of its (nonzero) digits is 11943936, while the sum is 58.

The spelling of 1026668648209 in words is "one trillion, twenty-six billion, six hundred sixty-eight million, six hundred forty-eight thousand, two hundred nine".