155234120309 has 2 divisors, whose sum is σ = 155234120310. Its totient is φ = 155234120308.

The previous prime is 155234120287. The next prime is 155234120333. The reversal of 155234120309 is 903021432551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96005163409 + 59228956900 = 309847^2 + 243370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155234120309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155234120369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77617060154 + 77617060155.

It is an arithmetic number, because the mean of its divisors is an integer number (77617060155).

Almost surely, 2^155234120309 is an apocalyptic number.

It is an amenable number.

155234120309 is a deficient number, since it is larger than the sum of its proper divisors (1).

155234120309 is an equidigital number, since it uses as much as digits as its factorization.

155234120309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 155234120309 in words is "one hundred fifty-five billion, two hundred thirty-four million, one hundred twenty thousand, three hundred nine".