320544443452155 has 16 divisors (see below), whose sum is σ = 552322733333280. Its totient is φ = 157806495237888.

The previous prime is 320544443452133. The next prime is 320544443452157. The reversal of 320544443452155 is 551254344445023.

It is not a de Polignac number, because 320544443452155 - 2¹³ = 320544443443963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320544443452098 and 320544443452107.

It is not an unprimeable number, because it can be changed into a prime (320544443452157) 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, 821908829170 + ... + 821908829559.

It is an arithmetic number, because the mean of its divisors is an integer number (34520170833330).

Almost surely, 2^{320544443452155} is an apocalyptic number.

320544443452155 is a deficient number, since it is larger than the sum of its proper divisors (231778289881125).

320544443452155 is a wasteful number, since it uses less digits than its factorization.

320544443452155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643817658750.

The product of its (nonzero) digits is 23040000, while the sum is 51.

Adding to 320544443452155 its reverse (551254344445023), we get a palindrome (871798787897178).

The spelling of 320544443452155 in words is "three hundred twenty trillion, five hundred forty-four billion, four hundred forty-three million, four hundred fifty-two thousand, one hundred fifty-five".