1001863664909 has 4 divisors (see below), whose sum is σ = 1034181847680. Its totient is φ = 969545482140.

The previous prime is 1001863664899. The next prime is 1001863664911. The reversal of 1001863664909 is 9094663681001.

1001863664909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1001863664909 - 2³⁶ = 933144188173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001863664939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16159091339 + ... + 16159091400.

It is an arithmetic number, because the mean of its divisors is an integer number (258545461920).

Almost surely, 2^{1001863664909} is an apocalyptic number.

It is an amenable number.

1001863664909 is a deficient number, since it is larger than the sum of its proper divisors (32318182771).

1001863664909 is an equidigital number, since it uses as much as digits as its factorization.

1001863664909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32318182770.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 1001863664909 in words is "one trillion, one billion, eight hundred sixty-three million, six hundred sixty-four thousand, nine hundred nine".