155555855 has 32 divisors (see below), whose sum is σ = 237686400. Its totient is φ = 95058432.

The previous prime is 155555839. The next prime is 155555863. The reversal of 155555855 is 558555551.

It is not a de Polignac number, because 155555855 - 2⁴ = 155555839 is a prime.

It is a zygodrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7301 + ... + 19089.

It is an arithmetic number, because the mean of its divisors is an integer number (7427700).

Almost surely, 2^155555855 is an apocalyptic number.

155555855 is a deficient number, since it is larger than the sum of its proper divisors (82130545).

155555855 is a wasteful number, since it uses less digits than its factorization.

155555855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11843.

The product of its digits is 625000, while the sum is 44.

The square root of 155555855 is about 12472.2032937248. The cubic root of 155555855 is about 537.8098937691.

The spelling of 155555855 in words is "one hundred fifty-five million, five hundred fifty-five thousand, eight hundred fifty-five".