3138857811 has 10 divisors (see below), whose sum is σ = 4688911172. Its totient is φ = 2092571820.

The previous prime is 3138857809. The next prime is 3138857831. The reversal of 3138857811 is 1187588313.

3138857811 is a `hidden beast` number, since 31 + 38 + 8 + 578 + 11 = 666.

It is not a de Polignac number, because 3138857811 - 2¹ = 3138857809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138857801) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19375585 + ... + 19375746.

Almost surely, 2^3138857811 is an apocalyptic number.

3138857811 is a deficient number, since it is larger than the sum of its proper divisors (1550053361).

3138857811 is an equidigital number, since it uses as much as digits as its factorization.

3138857811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38751343 (or 38751334 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 3138857811 is about 56025.5103591212. The cubic root of 3138857811 is about 1464.1667750413.

The spelling of 3138857811 in words is "three billion, one hundred thirty-eight million, eight hundred fifty-seven thousand, eight hundred eleven".