3868551021 has 16 divisors (see below), whose sum is σ = 5305837248. Its totient is φ = 2505369600.

The previous prime is 3868550953. The next prime is 3868551047. The reversal of 3868551021 is 1201558683.

It is not a de Polignac number, because 3868551021 - 2⁹ = 3868550509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868551821) 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 15 ways as a sum of consecutive naturals, for example, 43966 + ... + 98336.

It is an arithmetic number, because the mean of its divisors is an integer number (331614828).

Almost surely, 2^3868551021 is an apocalyptic number.

It is an amenable number.

3868551021 is a deficient number, since it is larger than the sum of its proper divisors (1437286227).

3868551021 is a wasteful number, since it uses less digits than its factorization.

3868551021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55052.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 3868551021 is about 62197.6769743051. The cubic root of 3868551021 is about 1569.8185005273.

The spelling of 3868551021 in words is "three billion, eight hundred sixty-eight million, five hundred fifty-one thousand, twenty-one".