155945559 has 32 divisors (see below), whose sum is σ = 272885760. Its totient is φ = 76744800.

The previous prime is 155945551. The next prime is 155945561. The reversal of 155945559 is 955549551.

155945559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155945559 - 2³ = 155945551 is a prime.

It is a super-4 number, since 4×155945559⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155945551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13377 + ... + 22154.

It is an arithmetic number, because the mean of its divisors is an integer number (8527680).

Almost surely, 2^155945559 is an apocalyptic number.

155945559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

155945559 is a deficient number, since it is larger than the sum of its proper divisors (116940201).

155945559 is a wasteful number, since it uses less digits than its factorization.

155945559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35571.

The product of its digits is 1012500, while the sum is 48.

The square root of 155945559 is about 12487.8164224175. The cubic root of 155945559 is about 538.2586326668.

The spelling of 155945559 in words is "one hundred fifty-five million, nine hundred forty-five thousand, five hundred fifty-nine".