6631913188 has 24 divisors (see below), whose sum is σ = 11809627200. Its totient is φ = 3258054240.

The previous prime is 6631913147. The next prime is 6631913209. The reversal of 6631913188 is 8813191366.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43363 + ... + 123061.

It is an arithmetic number, because the mean of its divisors is an integer number (492067800).

Almost surely, 2^6631913188 is an apocalyptic number.

It is an amenable number.

6631913188 is a deficient number, since it is larger than the sum of its proper divisors (5177714012).

6631913188 is a wasteful number, since it uses less digits than its factorization.

6631913188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80067 (or 80065 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 6631913188 is about 81436.5592838990. The cubic root of 6631913188 is about 1878.7959307540.

It can be divided in two parts, 66319 and 13188, that added together give a cube (79507 = 43³).

The spelling of 6631913188 in words is "six billion, six hundred thirty-one million, nine hundred thirteen thousand, one hundred eighty-eight".