55246181509 has 2 divisors, whose sum is σ = 55246181510. Its totient is φ = 55246181508.

The previous prime is 55246181479. The next prime is 55246181533. The reversal of 55246181509 is 90518164255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49084402500 + 6161779009 = 221550^2 + 78497^2 .

It is a cyclic number.

It is not a de Polignac number, because 55246181509 - 2⁷ = 55246181381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55246181909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27623090754 + 27623090755.

It is an arithmetic number, because the mean of its divisors is an integer number (27623090755).

Almost surely, 2^55246181509 is an apocalyptic number.

It is an amenable number.

55246181509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55246181509 is an equidigital number, since it uses as much as digits as its factorization.

55246181509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 46.

The spelling of 55246181509 in words is "fifty-five billion, two hundred forty-six million, one hundred eighty-one thousand, five hundred nine".