6538512680 has 128 divisors (see below), whose sum is σ = 17582745600. Its totient is φ = 2139616512.

The previous prime is 6538512671. The next prime is 6538512697. The reversal of 6538512680 is 862158356.

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, 4140131 + ... + 4141709.

It is an arithmetic number, because the mean of its divisors is an integer number (137365200).

Almost surely, 2^6538512680 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 6538512680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8791372800).

6538512680 is an abundant number, since it is smaller than the sum of its proper divisors (11044232920).

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

6538512680 is a wasteful number, since it uses less digits than its factorization.

6538512680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263 (or 2259 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 6538512680 is about 80861.0702377850. The cubic root of 6538512680 is about 1869.9341946397.

The spelling of 6538512680 in words is "six billion, five hundred thirty-eight million, five hundred twelve thousand, six hundred eighty".