6581955243 has 24 divisors (see below), whose sum is σ = 9292212048. Its totient is φ = 4143529728.

The previous prime is 6581955239. The next prime is 6581955269. The reversal of 6581955243 is 3425591856.

It is not a de Polignac number, because 6581955243 - 2² = 6581955239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6581955192 and 6581955201.

It is not an unprimeable number, because it can be changed into a prime (6581955203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329271 + ... + 348687.

It is an arithmetic number, because the mean of its divisors is an integer number (387175502).

Almost surely, 2^6581955243 is an apocalyptic number.

6581955243 is a deficient number, since it is larger than the sum of its proper divisors (2710256805).

6581955243 is a wasteful number, since it uses less digits than its factorization.

6581955243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19771 (or 19752 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 48.

The square root of 6581955243 is about 81129.2502307275. The cubic root of 6581955243 is about 1874.0664027062.

The spelling of 6581955243 in words is "six billion, five hundred eighty-one million, nine hundred fifty-five thousand, two hundred forty-three".