55144439507 has 4 divisors (see below), whose sum is σ = 55145156976. Its totient is φ = 55143722040.

The previous prime is 55144439459. The next prime is 55144439533. The reversal of 55144439507 is 70593444155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55144439507 - 2¹⁴ = 55144423123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55144439587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227423 + ... + 402504.

It is an arithmetic number, because the mean of its divisors is an integer number (13786289244).

Almost surely, 2^55144439507 is an apocalyptic number.

55144439507 is a deficient number, since it is larger than the sum of its proper divisors (717469).

55144439507 is an equidigital number, since it uses as much as digits as its factorization.

55144439507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717468.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 55144439507 in words is "fifty-five billion, one hundred forty-four million, four hundred thirty-nine thousand, five hundred seven".