155559849 has 4 divisors (see below), whose sum is σ = 207413136. Its totient is φ = 103706564.

The previous prime is 155559847. The next prime is 155559851. The reversal of 155559849 is 948955551.

155559849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (155559847) and next prime (155559851).

It is a cyclic number.

It is not a de Polignac number, because 155559849 - 2¹ = 155559847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155559841) 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, 25926639 + ... + 25926644.

It is an arithmetic number, because the mean of its divisors is an integer number (51853284).

Almost surely, 2^155559849 is an apocalyptic number.

It is an amenable number.

155559849 is a deficient number, since it is larger than the sum of its proper divisors (51853287).

155559849 is an equidigital number, since it uses as much as digits as its factorization.

155559849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51853286.

The product of its digits is 1620000, while the sum is 51.

The square root of 155559849 is about 12472.3634087530. The cubic root of 155559849 is about 537.8144966052.

The spelling of 155559849 in words is "one hundred fifty-five million, five hundred fifty-nine thousand, eight hundred forty-nine".