55385437769 has 2 divisors, whose sum is σ = 55385437770. Its totient is φ = 55385437768.

The previous prime is 55385437733. The next prime is 55385437859. The reversal of 55385437769 is 96773458355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53309268544 + 2076169225 = 230888^2 + 45565^2 .

It is a cyclic number.

It is not a de Polignac number, because 55385437769 - 2¹² = 55385433673 is a prime.

It is a super-2 number, since 2×55385437769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55385437369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27692718884 + 27692718885.

It is an arithmetic number, because the mean of its divisors is an integer number (27692718885).

Almost surely, 2^55385437769 is an apocalyptic number.

It is an amenable number.

55385437769 is a deficient number, since it is larger than the sum of its proper divisors (1).

55385437769 is an equidigital number, since it uses as much as digits as its factorization.

55385437769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256000, while the sum is 62.

The spelling of 55385437769 in words is "fifty-five billion, three hundred eighty-five million, four hundred thirty-seven thousand, seven hundred sixty-nine".