155864459 has 2 divisors, whose sum is σ = 155864460. Its totient is φ = 155864458.

The previous prime is 155864437. The next prime is 155864477. The reversal of 155864459 is 954468551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155864459 - 2²⁰ = 154815883 is a prime.

It is not a weakly prime, because it can be changed into another prime (155864759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77932229 + 77932230.

It is an arithmetic number, because the mean of its divisors is an integer number (77932230).

Almost surely, 2^155864459 is an apocalyptic number.

155864459 is a deficient number, since it is larger than the sum of its proper divisors (1).

155864459 is an equidigital number, since it uses as much as digits as its factorization.

155864459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 47.

The square root of 155864459 is about 12484.5688351661. The cubic root of 155864459 is about 538.1653087641.

The spelling of 155864459 in words is "one hundred fifty-five million, eight hundred sixty-four thousand, four hundred fifty-nine".