155164553161 has 2 divisors, whose sum is σ = 155164553162. Its totient is φ = 155164553160.

The previous prime is 155164553153. The next prime is 155164553191. The reversal of 155164553161 is 161355461551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111035568400 + 44128984761 = 333220^2 + 210069^2 .

It is an emirp because it is prime and its reverse (161355461551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155164553161 - 2³ = 155164553153 is a prime.

It is not a weakly prime, because it can be changed into another prime (155164553191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77582276580 + 77582276581.

It is an arithmetic number, because the mean of its divisors is an integer number (77582276581).

Almost surely, 2^155164553161 is an apocalyptic number.

It is an amenable number.

155164553161 is a deficient number, since it is larger than the sum of its proper divisors (1).

155164553161 is an equidigital number, since it uses as much as digits as its factorization.

155164553161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 43.

The spelling of 155164553161 in words is "one hundred fifty-five billion, one hundred sixty-four million, five hundred fifty-three thousand, one hundred sixty-one".