155671559 has 4 divisors (see below), whose sum is σ = 158310120. Its totient is φ = 153033000.

The previous prime is 155671519. The next prime is 155671561. The reversal of 155671559 is 955176551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155671559 - 2¹⁶ = 155606023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155671519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319192 + ... + 1319309.

It is an arithmetic number, because the mean of its divisors is an integer number (39577530).

Almost surely, 2^155671559 is an apocalyptic number.

155671559 is a deficient number, since it is larger than the sum of its proper divisors (2638561).

155671559 is an equidigital number, since it uses as much as digits as its factorization.

155671559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638560.

The product of its digits is 236250, while the sum is 44.

The square root of 155671559 is about 12476.8409062551. The cubic root of 155671559 is about 537.9432035140.

The spelling of 155671559 in words is "one hundred fifty-five million, six hundred seventy-one thousand, five hundred fifty-nine".