55645390447 has 2 divisors, whose sum is σ = 55645390448. Its totient is φ = 55645390446.

The previous prime is 55645390439. The next prime is 55645390483. The reversal of 55645390447 is 74409354655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55645390447 - 2³ = 55645390439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55645390394 and 55645390403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55645390547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822695223 + 27822695224.

It is an arithmetic number, because the mean of its divisors is an integer number (27822695224).

Almost surely, 2^55645390447 is an apocalyptic number.

55645390447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645390447 is an equidigital number, since it uses as much as digits as its factorization.

55645390447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 55645390447 in words is "fifty-five billion, six hundred forty-five million, three hundred ninety thousand, four hundred forty-seven".