55721665000650 has 48 divisors (see below), whose sum is σ = 150752431860768. Its totient is φ = 13508282424000.

The previous prime is 55721665000607. The next prime is 55721665000711. The reversal of 55721665000650 is 5600056612755.

It is a happy number.

55721665000650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55721665000650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16885351381 + ... + 16885354680.

It is an arithmetic number, because the mean of its divisors is an integer number (3140675663766).

Almost surely, 2^{55721665000650} is an apocalyptic number.

55721665000650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55721665000650 is an abundant number, since it is smaller than the sum of its proper divisors (95030766860118).

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

55721665000650 is a wasteful number, since it uses less digits than its factorization.

55721665000650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33770706087 (or 33770706082 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 48.

The spelling of 55721665000650 in words is "fifty-five trillion, seven hundred twenty-one billion, six hundred sixty-five million, six hundred fifty", and thus it is an aban number.