5515555111655 has 16 divisors (see below), whose sum is σ = 6941139955200. Its totient is φ = 4199389638048.

The previous prime is 5515555111639. The next prime is 5515555111673. The reversal of 5515555111655 is 5561115555155.

It is not a de Polignac number, because 5515555111655 - 2⁴ = 5515555111639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120483017 + ... + 120528786.

It is an arithmetic number, because the mean of its divisors is an integer number (433821247200).

Almost surely, 2^{5515555111655} is an apocalyptic number.

5515555111655 is a deficient number, since it is larger than the sum of its proper divisors (1425584843545).

5515555111655 is a wasteful number, since it uses less digits than its factorization.

5515555111655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241012030.

The product of its digits is 2343750, while the sum is 50.

The spelling of 5515555111655 in words is "five trillion, five hundred fifteen billion, five hundred fifty-five million, one hundred eleven thousand, six hundred fifty-five".