55611728945 has 4 divisors (see below), whose sum is σ = 66734074740. Its totient is φ = 44489383152.

The previous prime is 55611728929. The next prime is 55611728947. The reversal of 55611728945 is 54982711655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41596010401 + 14015718544 = 203951^2 + 118388^2 .

It is a cyclic number.

It is not a de Polignac number, because 55611728945 - 2⁴ = 55611728929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55611728947) 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 3 ways as a sum of consecutive naturals, for example, 5561172890 + ... + 5561172899.

It is an arithmetic number, because the mean of its divisors is an integer number (16683518685).

Almost surely, 2^55611728945 is an apocalyptic number.

It is an amenable number.

55611728945 is a deficient number, since it is larger than the sum of its proper divisors (11122345795).

55611728945 is a wasteful number, since it uses less digits than its factorization.

55611728945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122345794.

The product of its digits is 3024000, while the sum is 53.

The spelling of 55611728945 in words is "fifty-five billion, six hundred eleven million, seven hundred twenty-eight thousand, nine hundred forty-five".