2001335001563 has 4 divisors (see below), whose sum is σ = 2004157759680. Its totient is φ = 1998512243448.

The previous prime is 2001335001541. The next prime is 2001335001577. The reversal of 2001335001563 is 3651005331002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001335001563 - 2²⁰ = 2001333952987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001335001503) 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, 1411377995 + ... + 1411379412.

It is an arithmetic number, because the mean of its divisors is an integer number (501039439920).

Almost surely, 2^{2001335001563} is an apocalyptic number.

2001335001563 is a deficient number, since it is larger than the sum of its proper divisors (2822758117).

2001335001563 is an equidigital number, since it uses as much as digits as its factorization.

2001335001563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822758116.

The product of its (nonzero) digits is 8100, while the sum is 29.

The spelling of 2001335001563 in words is "two trillion, one billion, three hundred thirty-five million, one thousand, five hundred sixty-three".