3811945019 has 4 divisors (see below), whose sum is σ = 3837189840. Its totient is φ = 3786700200.

The previous prime is 3811944979. The next prime is 3811945021. The reversal of 3811945019 is 9105491183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9105491183 = 23 ⋅395890921.

It is a cyclic number.

It is not a de Polignac number, because 3811945019 - 2¹⁶ = 3811879483 is a prime.

It is a super-2 number, since 2×3811945019² = 29061849655757820722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3811945069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12622184 + ... + 12622485.

It is an arithmetic number, because the mean of its divisors is an integer number (959297460).

Almost surely, 2^3811945019 is an apocalyptic number.

3811945019 is a deficient number, since it is larger than the sum of its proper divisors (25244821).

3811945019 is a wasteful number, since it uses less digits than its factorization.

3811945019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25244820.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 3811945019 is about 61740.9509078051. The cubic root of 3811945019 is about 1562.1241361863.

It can be divided in two parts, 38119 and 45019, that added together give a palindrome (83138).

The spelling of 3811945019 in words is "three billion, eight hundred eleven million, nine hundred forty-five thousand, nineteen".