2185151164668 has 72 divisors (see below), whose sum is σ = 5849243054928. Its totient is φ = 685449681408.

The previous prime is 2185151164639. The next prime is 2185151164687. The reversal of 2185151164668 is 8664611515812.

It is a happy number.

2185151164668 is a `hidden beast` number, since 2 + 1 + 8 + 5 + 1 + 511 + 64 + 6 + 68 = 666.

It is a super-2 number, since 2×2185151164668² (a number of 25 digits) contains 22 as substring.

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, 4629955 + ... + 5080037.

It is an arithmetic number, because the mean of its divisors is an integer number (81239486874).

Almost surely, 2^{2185151164668} is an apocalyptic number.

It is an amenable number.

2185151164668 is an abundant number, since it is smaller than the sum of its proper divisors (3664091890260).

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

2185151164668 is a wasteful number, since it uses less digits than its factorization.

2185151164668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458043 (or 458038 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The spelling of 2185151164668 in words is "two trillion, one hundred eighty-five billion, one hundred fifty-one million, one hundred sixty-four thousand, six hundred sixty-eight".