55111100555 has 16 divisors (see below), whose sum is σ = 75657252864. Its totient is φ = 37752311520.

The previous prime is 55111100537. The next prime is 55111100557. The reversal of 55111100555 is 55500111155.

It is a happy number.

It is not a de Polignac number, because 55111100555 - 2¹² = 55111096459 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55111100557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759767 + ... + 829136.

It is an arithmetic number, because the mean of its divisors is an integer number (4728578304).

Almost surely, 2^55111100555 is an apocalyptic number.

55111100555 is a deficient number, since it is larger than the sum of its proper divisors (20546152309).

55111100555 is a wasteful number, since it uses less digits than its factorization.

55111100555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589906.

The product of its (nonzero) digits is 3125, while the sum is 29.

The spelling of 55111100555 in words is "fifty-five billion, one hundred eleven million, one hundred thousand, five hundred fifty-five".