55878589385 has 4 divisors (see below), whose sum is σ = 67054307268. Its totient is φ = 44702871504.

The previous prime is 55878589373. The next prime is 55878589387. The reversal of 55878589385 is 58398587855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58398587855 = 5 ⋅11679717571.

It can be written as a sum of positive squares in 2 ways, for example, as 27215760784 + 28662828601 = 164972^2 + 169301^2 .

It is a cyclic number.

It is not a de Polignac number, because 55878589385 - 2¹⁶ = 55878523849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55878589387) 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 in 3 ways as a sum of consecutive naturals, for example, 5587858934 + ... + 5587858943.

It is an arithmetic number, because the mean of its divisors is an integer number (16763576817).

Almost surely, 2^55878589385 is an apocalyptic number.

It is an amenable number.

55878589385 is a deficient number, since it is larger than the sum of its proper divisors (11175717883).

55878589385 is a wasteful number, since it uses less digits than its factorization.

55878589385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11175717882.

The product of its digits is 483840000, while the sum is 71.

The spelling of 55878589385 in words is "fifty-five billion, eight hundred seventy-eight million, five hundred eighty-nine thousand, three hundred eighty-five".