2168551672 has 16 divisors (see below), whose sum is σ = 4646896560. Its totient is φ = 929379264.

The previous prime is 2168551663. The next prime is 2168551673. The reversal of 2168551672 is 2761558612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168551673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19362013 + ... + 19362124.

It is an arithmetic number, because the mean of its divisors is an integer number (290431035).

Almost surely, 2^2168551672 is an apocalyptic number.

It is an amenable number.

2168551672 is an abundant number, since it is smaller than the sum of its proper divisors (2478344888).

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

2168551672 is a wasteful number, since it uses less digits than its factorization.

2168551672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38724150 (or 38724146 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 2168551672 is about 46567.7106158334. The cubic root of 2168551672 is about 1294.3644953089.

The spelling of 2168551672 in words is "two billion, one hundred sixty-eight million, five hundred fifty-one thousand, six hundred seventy-two".