155555505555 has 16 divisors (see below), whose sum is σ = 252968954784. Its totient is φ = 81602887680.

The previous prime is 155555505437. The next prime is 155555505577. The reversal of 155555505555 is 555505555551.

155555505555 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 155555505555 - 2¹² = 155555501459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155555505498 and 155555505507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85002094 + ... + 85003923.

It is an arithmetic number, because the mean of its divisors is an integer number (15810559674).

Almost surely, 2^155555505555 is an apocalyptic number.

155555505555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155555505555 is a deficient number, since it is larger than the sum of its proper divisors (97413449229).

155555505555 is a wasteful number, since it uses less digits than its factorization.

155555505555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170006086.

The product of its (nonzero) digits is 9765625, while the sum is 51.

The spelling of 155555505555 in words is "one hundred fifty-five billion, five hundred fifty-five million, five hundred five thousand, five hundred fifty-five".