6631021136 has 20 divisors (see below), whose sum is σ = 12849138912. Its totient is φ = 3315114336.

The previous prime is 6631021127. The next prime is 6631021157. The reversal of 6631021136 is 6311201366.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6631021099 and 6631021108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151175 + ... + 190041.

Almost surely, 2^6631021136 is an apocalyptic number.

It is an amenable number.

6631021136 is a deficient number, since it is larger than the sum of its proper divisors (6218117776).

6631021136 is a wasteful number, since it uses less digits than its factorization.

6631021136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49538 (or 49532 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 6631021136 is about 81431.0821247022. The cubic root of 6631021136 is about 1878.7116886572.

The spelling of 6631021136 in words is "six billion, six hundred thirty-one million, twenty-one thousand, one hundred thirty-six".