55644877 has 2 divisors, whose sum is σ = 55644878. Its totient is φ = 55644876.

The previous prime is 55644829. The next prime is 55644887. The reversal of 55644877 is 77844655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 11634921 = 6634^2 + 3411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55644877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55644887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822438 + 27822439.

It is an arithmetic number, because the mean of its divisors is an integer number (27822439).

Almost surely, 2^55644877 is an apocalyptic number.

It is an amenable number.

55644877 is a deficient number, since it is larger than the sum of its proper divisors (1).

55644877 is an equidigital number, since it uses as much as digits as its factorization.

55644877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940800, while the sum is 46.

The square root of 55644877 is about 7459.5493831732. The cubic root of 55644877 is about 381.7757997467.

The spelling of 55644877 in words is "fifty-five million, six hundred forty-four thousand, eight hundred seventy-seven".