6161983771 has 4 divisors (see below), whose sum is σ = 6374466000. Its totient is φ = 5949501544.

The previous prime is 6161983733. The next prime is 6161983783. The reversal of 6161983771 is 1773891616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6161983771 - 2⁷ = 6161983643 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6161983171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106241071 + ... + 106241128.

It is an arithmetic number, because the mean of its divisors is an integer number (1593616500).

Almost surely, 2^6161983771 is an apocalyptic number.

6161983771 is a deficient number, since it is larger than the sum of its proper divisors (212482229).

6161983771 is a wasteful number, since it uses less digits than its factorization.

6161983771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212482228.

The product of its digits is 381024, while the sum is 49.

The square root of 6161983771 is about 78498.3042555698. The cubic root of 6161983771 is about 1833.3280507359.

The spelling of 6161983771 in words is "six billion, one hundred sixty-one million, nine hundred eighty-three thousand, seven hundred seventy-one".