6561625846 has 4 divisors (see below), whose sum is σ = 9842438772. Its totient is φ = 3280812922.

The previous prime is 6561625841. The next prime is 6561625849. The reversal of 6561625846 is 6485261656.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6561625846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561625841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640406460 + ... + 1640406463.

It is an arithmetic number, because the mean of its divisors is an integer number (2460609693).

Almost surely, 2^6561625846 is an apocalyptic number.

6561625846 is a deficient number, since it is larger than the sum of its proper divisors (3280812926).

6561625846 is a wasteful number, since it uses less digits than its factorization.

6561625846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280812925.

The product of its digits is 2073600, while the sum is 49.

The square root of 6561625846 is about 81003.8631547903. The cubic root of 6561625846 is about 1872.1349638720.

The spelling of 6561625846 in words is "six billion, five hundred sixty-one million, six hundred twenty-five thousand, eight hundred forty-six".