3664111520205 has 24 divisors (see below), whose sum is σ = 6356752167480. Its totient is φ = 1952461877760.

The previous prime is 3664111520189. The next prime is 3664111520227. The reversal of 3664111520205 is 5020251114663.

3664111520205 is a `hidden beast` number, since 3 + 6 + 6 + 411 + 15 + 20 + 205 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 597066835401 + 3067044684804 = 772701^2 + 1751298^2 .

It is not a de Polignac number, because 3664111520205 - 2⁴ = 3664111520189 is a prime.

It is a super-2 number, since 2×3664111520205² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3664111520205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36009736 + ... + 36111345.

It is an arithmetic number, because the mean of its divisors is an integer number (264864673645).

Almost surely, 2^{3664111520205} is an apocalyptic number.

It is an amenable number.

3664111520205 is a deficient number, since it is larger than the sum of its proper divisors (2692640647275).

3664111520205 is a wasteful number, since it uses less digits than its factorization.

3664111520205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72122221 (or 72122218 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 3664111520205 its reverse (5020251114663), we get a palindrome (8684362634868).

The spelling of 3664111520205 in words is "three trillion, six hundred sixty-four billion, one hundred eleven million, five hundred twenty thousand, two hundred five".