55646605571 has 2 divisors, whose sum is σ = 55646605572. Its totient is φ = 55646605570.

The previous prime is 55646605501. The next prime is 55646605577. The reversal of 55646605571 is 17550664655.

55646605571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55646605571 - 2³⁰ = 54572863747 is a prime.

It is not a weakly prime, because it can be changed into another prime (55646605577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27823302785 + 27823302786.

It is an arithmetic number, because the mean of its divisors is an integer number (27823302786).

Almost surely, 2^55646605571 is an apocalyptic number.

55646605571 is a deficient number, since it is larger than the sum of its proper divisors (1).

55646605571 is an equidigital number, since it uses as much as digits as its factorization.

55646605571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780000, while the sum is 50.

The spelling of 55646605571 in words is "fifty-five billion, six hundred forty-six million, six hundred five thousand, five hundred seventy-one".