55642577 has 2 divisors, whose sum is σ = 55642578. Its totient is φ = 55642576.

The previous prime is 55642549. The next prime is 55642591. The reversal of 55642577 is 77524655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 229441 = 7444^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 55642577 - 2¹² = 55638481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55642537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27821288 + 27821289.

It is an arithmetic number, because the mean of its divisors is an integer number (27821289).

Almost surely, 2^55642577 is an apocalyptic number.

It is an amenable number.

55642577 is a deficient number, since it is larger than the sum of its proper divisors (1).

55642577 is an equidigital number, since it uses as much as digits as its factorization.

55642577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294000, while the sum is 41.

The square root of 55642577 is about 7459.3952167719. The cubic root of 55642577 is about 381.7705396252.

The spelling of 55642577 in words is "fifty-five million, six hundred forty-two thousand, five hundred seventy-seven".