3871768905 has 12 divisors (see below), whose sum is σ = 6711066180. Its totient is φ = 2064943392.

The previous prime is 3871768903. The next prime is 3871768931. The reversal of 3871768905 is 5098671783.

3871768905 is a `hidden beast` number, since 387 + 176 + 8 + 90 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 647346249 + 3224422656 = 25443^2 + 56784^2 .

It is not a de Polignac number, because 3871768905 - 2¹ = 3871768903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3871768903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43019610 + ... + 43019699.

It is an arithmetic number, because the mean of its divisors is an integer number (559255515).

Almost surely, 2^3871768905 is an apocalyptic number.

It is an amenable number.

3871768905 is a deficient number, since it is larger than the sum of its proper divisors (2839297275).

3871768905 is a wasteful number, since it uses less digits than its factorization.

3871768905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86039320 (or 86039317 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The square root of 3871768905 is about 62223.5397980539. The cubic root of 3871768905 is about 1570.2536413879.

The spelling of 3871768905 in words is "three billion, eight hundred seventy-one million, seven hundred sixty-eight thousand, nine hundred five".