56643577 has 2 divisors, whose sum is σ = 56643578. Its totient is φ = 56643576.

The previous prime is 56643569. The next prime is 56643581. The reversal of 56643577 is 77534665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31483321 + 25160256 = 5611^2 + 5016^2 .

It is a cyclic number.

It is not a de Polignac number, because 56643577 - 2³ = 56643569 is a prime.

It is not a weakly prime, because it can be changed into another prime (56643557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28321788 + 28321789.

It is an arithmetic number, because the mean of its divisors is an integer number (28321789).

Almost surely, 2^56643577 is an apocalyptic number.

It is an amenable number.

56643577 is a deficient number, since it is larger than the sum of its proper divisors (1).

56643577 is an equidigital number, since it uses as much as digits as its factorization.

56643577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 43.

The square root of 56643577 is about 7526.1927293951. The cubic root of 56643577 is about 384.0462748957.

The spelling of 56643577 in words is "fifty-six million, six hundred forty-three thousand, five hundred seventy-seven".