6161111919 has 6 divisors (see below), whose sum is σ = 8899383896. Its totient is φ = 4107407940.

The previous prime is 6161111911. The next prime is 6161111927. The reversal of 6161111919 is 9191111616.

6161111919 is a `hidden beast` number, since 616 + 1 + 11 + 19 + 19 = 666.

It is an interprime number because it is at equal distance from previous prime (6161111911) and next prime (6161111927).

It is not a de Polignac number, because 6161111919 - 2³ = 6161111911 is a prime.

It is a super-2 number, since 2×6161111919² = 75918600156887725122, which contains 22 as substring.

6161111919 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161111911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342283987 + ... + 342284004.

Almost surely, 2^6161111919 is an apocalyptic number.

6161111919 is a deficient number, since it is larger than the sum of its proper divisors (2738271977).

6161111919 is a wasteful number, since it uses less digits than its factorization.

6161111919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684567997 (or 684567994 counting only the distinct ones).

The product of its digits is 2916, while the sum is 36.

The square root of 6161111919 is about 78492.7507417086. The cubic root of 6161111919 is about 1833.2415814982.

The spelling of 6161111919 in words is "six billion, one hundred sixty-one million, one hundred eleven thousand, nine hundred nineteen".