55640768847 has 16 divisors (see below), whose sum is σ = 75462710400. Its totient is φ = 36460874912.

The previous prime is 55640768819. The next prime is 55640768857. The reversal of 55640768847 is 74886704655.

It is a cyclic number.

It is not a de Polignac number, because 55640768847 - 2¹⁹ = 55640244559 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640768857) 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 in 15 ways as a sum of consecutive naturals, for example, 518097 + ... + 616202.

It is an arithmetic number, because the mean of its divisors is an integer number (4716419400).

Almost surely, 2^55640768847 is an apocalyptic number.

55640768847 is a deficient number, since it is larger than the sum of its proper divisors (19821941553).

55640768847 is a wasteful number, since it uses less digits than its factorization.

55640768847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134582.

The product of its (nonzero) digits is 45158400, while the sum is 60.

The spelling of 55640768847 in words is "fifty-five billion, six hundred forty million, seven hundred sixty-eight thousand, eight hundred forty-seven".