6178863861 has 12 divisors (see below), whose sum is σ = 9093422988. Its totient is φ = 4041520704.

The previous prime is 6178863811. The next prime is 6178863881. The reversal of 6178863861 is 1683688716.

It can be written as a sum of positive squares in 2 ways, for example, as 4325561361 + 1853302500 = 65769^2 + 43050^2 .

It is not a de Polignac number, because 6178863861 - 2⁹ = 6178863349 is a prime.

It is a super-2 number, since 2×6178863861² = 76356717225543654642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6178863798 and 6178863807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6178863811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6476320 + ... + 6477273.

It is an arithmetic number, because the mean of its divisors is an integer number (757785249).

Almost surely, 2^6178863861 is an apocalyptic number.

It is an amenable number.

6178863861 is a deficient number, since it is larger than the sum of its proper divisors (2914559127).

6178863861 is a wasteful number, since it uses less digits than its factorization.

6178863861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12953652 (or 12953649 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 6178863861 is about 78605.7495416207. The cubic root of 6178863861 is about 1835.0005925748. Note that the first 3 decimals are identical.

The spelling of 6178863861 in words is "six billion, one hundred seventy-eight million, eight hundred sixty-three thousand, eight hundred sixty-one".