2168505372 has 36 divisors (see below), whose sum is σ = 5561652488. Its totient is φ = 657122400.

The previous prime is 2168505341. The next prime is 2168505401. The reversal of 2168505372 is 2735058612.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2168505372.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 745279 + ... + 748182.

Almost surely, 2^2168505372 is an apocalyptic number.

2168505372 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2168505372 is an abundant number, since it is smaller than the sum of its proper divisors (3393147116).

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

2168505372 is a wasteful number, since it uses less digits than its factorization.

2168505372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493490 (or 1493477 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 2168505372 is about 46567.2134876031. The cubic root of 2168505372 is about 1294.3552833998.

It can be divided in two parts, 216850 and 5372, that added together give a palindrome (222222).

The spelling of 2168505372 in words is "two billion, one hundred sixty-eight million, five hundred five thousand, three hundred seventy-two".