155823361193 has 2 divisors, whose sum is σ = 155823361194. Its totient is φ = 155823361192.

The previous prime is 155823361163. The next prime is 155823361219. The reversal of 155823361193 is 391163328551.

155823361193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155328209689 + 495151504 = 394117^2 + 22252^2 .

It is an emirp because it is prime and its reverse (391163328551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155823361193 - 2²² = 155819166889 is a prime.

It is not a weakly prime, because it can be changed into another prime (155823361163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77911680596 + 77911680597.

It is an arithmetic number, because the mean of its divisors is an integer number (77911680597).

Almost surely, 2^155823361193 is an apocalyptic number.

It is an amenable number.

155823361193 is a deficient number, since it is larger than the sum of its proper divisors (1).

155823361193 is an equidigital number, since it uses as much as digits as its factorization.

155823361193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 47.

The spelling of 155823361193 in words is "one hundred fifty-five billion, eight hundred twenty-three million, three hundred sixty-one thousand, one hundred ninety-three".