55381344318355 has 16 divisors (see below), whose sum is σ = 72509210658144. Its totient is φ = 40271787834880.

The previous prime is 55381344318353. The next prime is 55381344318361.

55381344318355 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55381344318355 - 2¹ = 55381344318353 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 55381344318355.

It is not an unprimeable number, because it can be changed into a prime (55381344318353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69016054 + ... + 69813883.

It is an arithmetic number, because the mean of its divisors is an integer number (4531825666134).

Almost surely, 2^{55381344318355} is an apocalyptic number.

55381344318355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55381344318355 is a deficient number, since it is larger than the sum of its proper divisors (17127866339789).

55381344318355 is a wasteful number, since it uses less digits than its factorization.

55381344318355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138837206.

The product of its digits is 51840000, while the sum is 58.

The spelling of 55381344318355 in words is "fifty-five trillion, three hundred eighty-one billion, three hundred forty-four million, three hundred eighteen thousand, three hundred fifty-five".