2868651981 has 24 divisors (see below), whose sum is σ = 4465493760. Its totient is φ = 1764079776.

The previous prime is 2868651943. The next prime is 2868652001. The reversal of 2868651981 is 1891568682.

It is a happy number.

It is not a de Polignac number, because 2868651981 - 2¹¹ = 2868649933 is a prime.

It is a super-2 number, since 2×2868651981² = 16458328376190448722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868651911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174540 + ... + 190266.

It is an arithmetic number, because the mean of its divisors is an integer number (186062240).

Almost surely, 2^2868651981 is an apocalyptic number.

It is an amenable number.

2868651981 is a deficient number, since it is larger than the sum of its proper divisors (1596841779).

2868651981 is a wasteful number, since it uses less digits than its factorization.

2868651981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17305 (or 17302 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 2868651981 is about 53559.7981792314. The cubic root of 2868651981 is about 1420.8861725383.

The spelling of 2868651981 in words is "two billion, eight hundred sixty-eight million, six hundred fifty-one thousand, nine hundred eighty-one".