155555555 has 8 divisors (see below), whose sum is σ = 194782752. Its totient is φ = 119033728.

The previous prime is 155555549. The next prime is 155555573. The reversal of 155555555 is 555555551.

155555555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155555555 - 2⁴ = 155555539 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

155555555 is a modest number, since divided by 55555 gives 1555 as remainder.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676214 + ... + 676443.

It is an arithmetic number, because the mean of its divisors is an integer number (24347844).

Almost surely, 2^155555555 is an apocalyptic number.

155555555 is a deficient number, since it is larger than the sum of its proper divisors (39227197).

155555555 is a wasteful number, since it uses less digits than its factorization.

155555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352685.

The product of its digits is 390625, while the sum is 41.

The square root of 155555555 is about 12472.1912669747. The cubic root of 155555555 is about 537.8095480346.

The spelling of 155555555 in words is "one hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".