155259234917 has 2 divisors, whose sum is σ = 155259234918. Its totient is φ = 155259234916.

The previous prime is 155259234859. The next prime is 155259234961. The reversal of 155259234917 is 719432952551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92383170916 + 62876064001 = 303946^2 + 250751^2 .

It is an emirp because it is prime and its reverse (719432952551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155259234917 - 2¹⁰ = 155259233893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155259234817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77629617458 + 77629617459.

It is an arithmetic number, because the mean of its divisors is an integer number (77629617459).

Almost surely, 2^155259234917 is an apocalyptic number.

It is an amenable number.

155259234917 is a deficient number, since it is larger than the sum of its proper divisors (1).

155259234917 is an equidigital number, since it uses as much as digits as its factorization.

155259234917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402000, while the sum is 53.

The spelling of 155259234917 in words is "one hundred fifty-five billion, two hundred fifty-nine million, two hundred thirty-four thousand, nine hundred seventeen".