55438880567 has 4 divisors (see below), whose sum is σ = 63358720656. Its totient is φ = 47519040480.

The previous prime is 55438880543. The next prime is 55438880569. The reversal of 55438880567 is 76508883455.

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 55438880567 - 2¹⁸ = 55438618423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55438880569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3959920034 + ... + 3959920047.

It is an arithmetic number, because the mean of its divisors is an integer number (15839680164).

Almost surely, 2^55438880567 is an apocalyptic number.

55438880567 is a deficient number, since it is larger than the sum of its proper divisors (7919840089).

55438880567 is an equidigital number, since it uses as much as digits as its factorization.

55438880567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7919840088.

The product of its (nonzero) digits is 32256000, while the sum is 59.

The spelling of 55438880567 in words is "fifty-five billion, four hundred thirty-eight million, eight hundred eighty thousand, five hundred sixty-seven".