55511166615 has 16 divisors (see below), whose sum is σ = 88823196000. Its totient is φ = 29604179072.

The previous prime is 55511166587. The next prime is 55511166617. The reversal of 55511166615 is 51666111555.

It is a cyclic number.

It is not a de Polignac number, because 55511166615 - 2⁶ = 55511166551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511166617) 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, 170281 + ... + 374189.

It is an arithmetic number, because the mean of its divisors is an integer number (5551449750).

Almost surely, 2^55511166615 is an apocalyptic number.

55511166615 is a deficient number, since it is larger than the sum of its proper divisors (33312029385).

55511166615 is a wasteful number, since it uses less digits than its factorization.

55511166615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222066.

The product of its digits is 135000, while the sum is 42.

The spelling of 55511166615 in words is "fifty-five billion, five hundred eleven million, one hundred sixty-six thousand, six hundred fifteen".