2001504785863 has 16 divisors (see below), whose sum is σ = 2312290181376. Its totient is φ = 1712227386240.

The previous prime is 2001504785849. The next prime is 2001504785881. The reversal of 2001504785863 is 3685874051002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2001504785863 - 2⁹ = 2001504785351 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 (2001504785843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204070 + ... + 2011132.

It is an arithmetic number, because the mean of its divisors is an integer number (144518136336).

Almost surely, 2^{2001504785863} is an apocalyptic number.

2001504785863 is a deficient number, since it is larger than the sum of its proper divisors (310785395513).

2001504785863 is a wasteful number, since it uses less digits than its factorization.

2001504785863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813014.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 2001504785863 in words is "two trillion, one billion, five hundred four million, seven hundred eighty-five thousand, eight hundred sixty-three".