55511165655 has 24 divisors (see below), whose sum is σ = 104966568720. Its totient is φ = 26914504320.

The previous prime is 55511165651. The next prime is 55511165659. The reversal of 55511165655 is 55656111555.

It is an interprime number because it is at equal distance from previous prime (55511165651) and next prime (55511165659).

It is not a de Polignac number, because 55511165655 - 2² = 55511165651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55511165655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511165651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56071390 + ... + 56072379.

It is an arithmetic number, because the mean of its divisors is an integer number (4373607030).

Almost surely, 2^55511165655 is an apocalyptic number.

55511165655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55511165655 is a deficient number, since it is larger than the sum of its proper divisors (49455403065).

55511165655 is a wasteful number, since it uses less digits than its factorization.

55511165655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112143791 (or 112143788 counting only the distinct ones).

The product of its digits is 562500, while the sum is 45.

The spelling of 55511165655 in words is "fifty-five billion, five hundred eleven million, one hundred sixty-five thousand, six hundred fifty-five".