2163999403908 has 18 divisors (see below), whose sum is σ = 5470109604414. Its totient is φ = 721333134624.

The previous prime is 2163999403879. The next prime is 2163999404003. The reversal of 2163999403908 is 8093049993612.

2163999403908 is a `hidden beast` number, since 21 + 6 + 39 + 99 + 403 + 90 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1967645841984 + 196353561924 = 1402728^2 + 443118^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2163999403908² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30055547241 + ... + 30055547312.

It is an arithmetic number, because the mean of its divisors is an integer number (303894978023).

Almost surely, 2^{2163999403908} is an apocalyptic number.

It is an amenable number.

2163999403908 is an abundant number, since it is smaller than the sum of its proper divisors (3306110200506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2163999403908 is a wasteful number, since it uses less digits than its factorization.

2163999403908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60111094563 (or 60111094558 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 63.

The spelling of 2163999403908 in words is "two trillion, one hundred sixty-three billion, nine hundred ninety-nine million, four hundred three thousand, nine hundred eight".