155358869 has 4 divisors (see below), whose sum is σ = 164497644. Its totient is φ = 146220096.

The previous prime is 155358823. The next prime is 155358901. The reversal of 155358869 is 968853551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 968853551 = 79 ⋅12263969.

It can be written as a sum of positive squares in 2 ways, for example, as 49885969 + 105472900 = 7063^2 + 10270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155358869 is a prime.

It is a super-2 number, since 2×155358869² = 48272756353918322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155358809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4569362 + ... + 4569395.

It is an arithmetic number, because the mean of its divisors is an integer number (41124411).

Almost surely, 2^155358869 is an apocalyptic number.

It is an amenable number.

155358869 is a deficient number, since it is larger than the sum of its proper divisors (9138775).

155358869 is an equidigital number, since it uses as much as digits as its factorization.

155358869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138774.

The product of its digits is 1296000, while the sum is 50.

The square root of 155358869 is about 12464.3037912272. The cubic root of 155358869 is about 537.5827818416.

The spelling of 155358869 in words is "one hundred fifty-five million, three hundred fifty-eight thousand, eight hundred sixty-nine".