55611111111655 has 8 divisors (see below), whose sum is σ = 72800000000784. Its totient is φ = 40444444444800.

The previous prime is 55611111111553. The next prime is 55611111111727.

55611111111655 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 55611111111655 - 2¹¹ = 55611111109607 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 505555555506 + ... + 505555555615.

It is an arithmetic number, because the mean of its divisors is an integer number (9100000000098).

Almost surely, 2^{55611111111655} is an apocalyptic number.

55611111111655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55611111111655 is a deficient number, since it is larger than the sum of its proper divisors (17188888889129).

55611111111655 is a wasteful number, since it uses less digits than its factorization.

55611111111655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011111111137.

The product of its digits is 22500, while the sum is 40.

It can be divided in two parts, 5561111 and 1111655, that added together give a palindrome (6672766).

The spelling of 55611111111655 in words is "fifty-five trillion, six hundred eleven billion, one hundred eleven million, one hundred eleven thousand, six hundred fifty-five".