155368809 has 12 divisors (see below), whose sum is σ = 230487556. Its totient is φ = 100779552.

The previous prime is 155368799. The next prime is 155368819. The reversal of 155368809 is 908863551.

155368809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155368799) and next prime (155368819).

It can be written as a sum of positive squares in 2 ways, for example, as 142922025 + 12446784 = 11955^2 + 3528^2 .

It is not a de Polignac number, because 155368809 - 2⁵ = 155368777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155368819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232954 + ... + 233619.

Almost surely, 2^155368809 is an apocalyptic number.

It is an amenable number.

155368809 is a deficient number, since it is larger than the sum of its proper divisors (75118747).

155368809 is a wasteful number, since it uses less digits than its factorization.

155368809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466616 (or 466613 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 155368809 is about 12464.7025235262. The cubic root of 155368809 is about 537.5942466068.

The spelling of 155368809 in words is "one hundred fifty-five million, three hundred sixty-eight thousand, eight hundred nine".