3161861919 has 32 divisors (see below), whose sum is σ = 4726937600. Its totient is φ = 2088789120.

The previous prime is 3161861917. The next prime is 3161861987. The reversal of 3161861919 is 9191681613.

3161861919 is a `hidden beast` number, since 3 + 1 + 6 + 18 + 619 + 19 = 666.

It is not a de Polignac number, because 3161861919 - 2¹ = 3161861917 is a prime.

It is a super-2 number, since 2×3161861919² = 19994741589644725122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3161861917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1449972 + ... + 1452150.

It is an arithmetic number, because the mean of its divisors is an integer number (147716800).

Almost surely, 2^3161861919 is an apocalyptic number.

3161861919 is a deficient number, since it is larger than the sum of its proper divisors (1565075681).

3161861919 is a wasteful number, since it uses less digits than its factorization.

3161861919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652 (or 2646 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 3161861919 is about 56230.4358777344. The cubic root of 3161861919 is about 1467.7349414842.

The spelling of 3161861919 in words is "three billion, one hundred sixty-one million, eight hundred sixty-one thousand, nine hundred nineteen".