55611000561 has 16 divisors (see below), whose sum is σ = 77106447360. Its totient is φ = 35608164480.

The previous prime is 55611000541. The next prime is 55611000563. The reversal of 55611000561 is 16500011655.

It is not a de Polignac number, because 55611000561 - 2¹³ = 55610992369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55611000563) 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, 1656700 + ... + 1689933.

It is an arithmetic number, because the mean of its divisors is an integer number (4819152960).

Almost surely, 2^55611000561 is an apocalyptic number.

It is an amenable number.

55611000561 is a deficient number, since it is larger than the sum of its proper divisors (21495446799).

55611000561 is a wasteful number, since it uses less digits than its factorization.

55611000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346856.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 55611000561 in words is "fifty-five billion, six hundred eleven million, five hundred sixty-one", and thus it is an aban number.