155655555 has 16 divisors (see below), whose sum is σ = 271689984. Its totient is φ = 75469280.

The previous prime is 155655551. The next prime is 155655569. The reversal of 155655555 is 555556551.

It is not a de Polignac number, because 155655555 - 2² = 155655551 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (155655551) 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 15 ways as a sum of consecutive naturals, for example, 471519 + ... + 471848.

It is an arithmetic number, because the mean of its divisors is an integer number (16980624).

Almost surely, 2^155655555 is an apocalyptic number.

155655555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155655555 is a deficient number, since it is larger than the sum of its proper divisors (116034429).

155655555 is a wasteful number, since it uses less digits than its factorization.

155655555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943386.

The product of its digits is 468750, while the sum is 42.

The square root of 155655555 is about 12476.1995415271. The cubic root of 155655555 is about 537.9247682516.

The spelling of 155655555 in words is "one hundred fifty-five million, six hundred fifty-five thousand, five hundred fifty-five".