155120511353417 has 2 divisors, whose sum is σ = 155120511353418. Its totient is φ = 155120511353416.

The previous prime is 155120511353377. The next prime is 155120511353419. The reversal of 155120511353417 is 714353115021551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85552584287296 + 69567927066121 = 9249464^2 + 8340739^2 .

It is a cyclic number.

It is not a de Polignac number, because 155120511353417 - 2²⁶ = 155120444244553 is a prime.

Together with 155120511353419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155120511353419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77560255676708 + 77560255676709.

It is an arithmetic number, because the mean of its divisors is an integer number (77560255676709).

Almost surely, 2^{155120511353417} is an apocalyptic number.

It is an amenable number.

155120511353417 is a deficient number, since it is larger than the sum of its proper divisors (1).

155120511353417 is an equidigital number, since it uses as much as digits as its factorization.

155120511353417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315000, while the sum is 44.

Adding to 155120511353417 its reverse (714353115021551), we get a palindrome (869473626374968).

The spelling of 155120511353417 in words is "one hundred fifty-five trillion, one hundred twenty billion, five hundred eleven million, three hundred fifty-three thousand, four hundred seventeen".