6536692640 has 24 divisors (see below), whose sum is σ = 15442936740. Its totient is φ = 2614676992.

The previous prime is 6536692637. The next prime is 6536692651. The reversal of 6536692640 is 462966356.

It can be written as a sum of positive squares in 2 ways, for example, as 5418726544 + 1117966096 = 73612^2 + 33436^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20427005 + ... + 20427324.

Almost surely, 2^6536692640 is an apocalyptic number.

It is an amenable number.

6536692640 is an abundant number, since it is smaller than the sum of its proper divisors (8906244100).

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

6536692640 is a wasteful number, since it uses less digits than its factorization.

6536692640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40854344 (or 40854336 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 47.

The square root of 6536692640 is about 80849.8153368330. The cubic root of 6536692640 is about 1869.7606755216.

The spelling of 6536692640 in words is "six billion, five hundred thirty-six million, six hundred ninety-two thousand, six hundred forty".