55642344324655 has 8 divisors (see below), whose sum is σ = 72840887115984. Its totient is φ = 40467159508800.

The previous prime is 55642344324649. The next prime is 55642344324667.

It is a happy number.

55642344324655 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-55642344324655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55642344324655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505839493806 + ... + 505839493915.

It is an arithmetic number, because the mean of its divisors is an integer number (9105110889498).

Almost surely, 2^{55642344324655} is an apocalyptic number.

55642344324655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55642344324655 is a deficient number, since it is larger than the sum of its proper divisors (17198542791329).

55642344324655 is a wasteful number, since it uses less digits than its factorization.

55642344324655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011678987737.

The product of its digits is 207360000, while the sum is 58.

It can be divided in two parts, 5564234 and 4324655, that added together give a palindrome (9888889).

The spelling of 55642344324655 in words is "fifty-five trillion, six hundred forty-two billion, three hundred forty-four million, three hundred twenty-four thousand, six hundred fifty-five".