53561643366 has 64 divisors (see below), whose sum is σ = 135385929216. Its totient is φ = 13721529600.

The previous prime is 53561643337. The next prime is 53561643389. The reversal of 53561643366 is 66334616535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 760345 + ... + 827796.

It is an arithmetic number, because the mean of its divisors is an integer number (2115405144).

Almost surely, 2^53561643366 is an apocalyptic number.

53561643366 is an abundant number, since it is smaller than the sum of its proper divisors (81824285850).

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

53561643366 is a wasteful number, since it uses less digits than its factorization.

53561643366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588237.

The product of its digits is 3499200, while the sum is 48.

The spelling of 53561643366 in words is "fifty-three billion, five hundred sixty-one million, six hundred forty-three thousand, three hundred sixty-six".