155063423209 has 2 divisors, whose sum is σ = 155063423210. Its totient is φ = 155063423208.

The previous prime is 155063423201. The next prime is 155063423213. The reversal of 155063423209 is 902324360551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138530606809 + 16532816400 = 372197^2 + 128580^2 .

It is a cyclic number.

It is not a de Polignac number, because 155063423209 - 2³ = 155063423201 is a prime.

It is not a weakly prime, because it can be changed into another prime (155063423201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77531711604 + 77531711605.

It is an arithmetic number, because the mean of its divisors is an integer number (77531711605).

Almost surely, 2^155063423209 is an apocalyptic number.

It is an amenable number.

155063423209 is a deficient number, since it is larger than the sum of its proper divisors (1).

155063423209 is an equidigital number, since it uses as much as digits as its factorization.

155063423209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 155063423209 in words is "one hundred fifty-five billion, sixty-three million, four hundred twenty-three thousand, two hundred nine".