155844157 has 12 divisors (see below), whose sum is σ = 185712156. Its totient is φ = 130320960.

The previous prime is 155844131. The next prime is 155844179. The reversal of 155844157 is 751448551.

It can be written as a sum of positive squares in 2 ways, for example, as 85636516 + 70207641 = 9254^2 + 8379^2 .

It is not a de Polignac number, because 155844157 - 2¹¹ = 155842109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155844107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36778 + ... + 40795.

It is an arithmetic number, because the mean of its divisors is an integer number (15476013).

Almost surely, 2^155844157 is an apocalyptic number.

It is an amenable number.

155844157 is a deficient number, since it is larger than the sum of its proper divisors (29867999).

155844157 is an equidigital number, since it uses as much as digits as its factorization.

155844157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77628 (or 77621 counting only the distinct ones).

The product of its digits is 112000, while the sum is 40.

The square root of 155844157 is about 12483.7557249411. The cubic root of 155844157 is about 538.1419416527.

The spelling of 155844157 in words is "one hundred fifty-five million, eight hundred forty-four thousand, one hundred fifty-seven".