55211506665 has 16 divisors (see below), whose sum is σ = 100958183808. Its totient is φ = 25239545856.

The previous prime is 55211506621. The next prime is 55211506733. The reversal of 55211506665 is 56660511255.

It is not a de Polignac number, because 55211506665 - 2¹¹ = 55211504617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262911832 + ... + 262912041.

It is an arithmetic number, because the mean of its divisors is an integer number (6309886488).

Almost surely, 2^55211506665 is an apocalyptic number.

It is an amenable number.

55211506665 is a deficient number, since it is larger than the sum of its proper divisors (45746677143).

55211506665 is a wasteful number, since it uses less digits than its factorization.

55211506665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525823888.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 55211506665 in words is "fifty-five billion, two hundred eleven million, five hundred six thousand, six hundred sixty-five".