6561052646 has 16 divisors (see below), whose sum is σ = 9946495104. Its totient is φ = 3245577984.

The previous prime is 6561052637. The next prime is 6561052717. The reversal of 6561052646 is 6462501656.

It is a congruent 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, 971096 + ... + 977828.

It is an arithmetic number, because the mean of its divisors is an integer number (621655944).

Almost surely, 2^6561052646 is an apocalyptic number.

6561052646 is a deficient number, since it is larger than the sum of its proper divisors (3385442458).

6561052646 is a wasteful number, since it uses less digits than its factorization.

6561052646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11855.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 6561052646 is about 81000.3249746567. The cubic root of 6561052646 is about 1872.0804479621.

The spelling of 6561052646 in words is "six billion, five hundred sixty-one million, fifty-two thousand, six hundred forty-six".