56555455577 has 2 divisors, whose sum is σ = 56555455578. Its totient is φ = 56555455576.

The previous prime is 56555455553. The next prime is 56555455589. The reversal of 56555455577 is 77555455565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37842309961 + 18713145616 = 194531^2 + 136796^2 .

It is a cyclic number.

It is not a de Polignac number, because 56555455577 - 2¹² = 56555451481 is a prime.

It is not a weakly prime, because it can be changed into another prime (56555455507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28277727788 + 28277727789.

It is an arithmetic number, because the mean of its divisors is an integer number (28277727789).

Almost surely, 2^56555455577 is an apocalyptic number.

It is an amenable number.

56555455577 is a deficient number, since it is larger than the sum of its proper divisors (1).

56555455577 is an equidigital number, since it uses as much as digits as its factorization.

56555455577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91875000, while the sum is 59.

The spelling of 56555455577 in words is "fifty-six billion, five hundred fifty-five million, four hundred fifty-five thousand, five hundred seventy-seven".