6631921548 has 96 divisors (see below), whose sum is σ = 19665139200. Its totient is φ = 1893388608.

The previous prime is 6631921531. The next prime is 6631921573. The reversal of 6631921548 is 8451291366.

6631921548 is a `hidden beast` number, since 6 + 631 + 9 + 2 + 1 + 5 + 4 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1348518 + ... + 1353426.

It is an arithmetic number, because the mean of its divisors is an integer number (204845200).

Almost surely, 2^6631921548 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6631921548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9832569600).

6631921548 is an abundant number, since it is smaller than the sum of its proper divisors (13033217652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6631921548 is a wasteful number, since it uses less digits than its factorization.

6631921548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6716 (or 6708 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 6631921548 is about 81436.6106121811. The cubic root of 6631921548 is about 1878.7967202058.

The spelling of 6631921548 in words is "six billion, six hundred thirty-one million, nine hundred twenty-one thousand, five hundred forty-eight".