55155004447 has 2 divisors, whose sum is σ = 55155004448. Its totient is φ = 55155004446.

The previous prime is 55155004441. The next prime is 55155004501. The reversal of 55155004447 is 74440055155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55155004447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55155004441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27577502223 + 27577502224.

It is an arithmetic number, because the mean of its divisors is an integer number (27577502224).

Almost surely, 2^55155004447 is an apocalyptic number.

55155004447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55155004447 is an equidigital number, since it uses as much as digits as its factorization.

55155004447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280000, while the sum is 40.

The spelling of 55155004447 in words is "fifty-five billion, one hundred fifty-five million, four thousand, four hundred forty-seven".