3868551909 has 48 divisors (see below), whose sum is σ = 6092264880. Its totient is φ = 2355609600.

The previous prime is 3868551887. The next prime is 3868551913. The reversal of 3868551909 is 9091558683.

It is a happy number.

3868551909 is a `hidden beast` number, since 3 + 86 + 8 + 551 + 9 + 0 + 9 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 124947684 + 3743604225 = 11178^2 + 61185^2 .

It is not a de Polignac number, because 3868551909 - 2⁵ = 3868551877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868551959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3220509 + ... + 3221709.

It is an arithmetic number, because the mean of its divisors is an integer number (126922185).

Almost surely, 2^3868551909 is an apocalyptic number.

It is an amenable number.

3868551909 is a deficient number, since it is larger than the sum of its proper divisors (2223712971).

3868551909 is a wasteful number, since it uses less digits than its factorization.

3868551909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The square root of 3868551909 is about 62197.6841128349. The cubic root of 3868551909 is about 1569.8186206410.

The spelling of 3868551909 in words is "three billion, eight hundred sixty-eight million, five hundred fifty-one thousand, nine hundred nine".