55505055555505 has 4 divisors (see below), whose sum is σ = 66606066666612. Its totient is φ = 44404044444400.

The previous prime is 55505055555479. The next prime is 55505055555517. The reversal of 55505055555505 is 50555555050555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25476014580129 + 30029040975376 = 5047377^2 + 5479876^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55505055555505 is a prime.

It is a super-2 number, since 2×55505055555505² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550505555546 + ... + 5550505555555.

It is an arithmetic number, because the mean of its divisors is an integer number (16651516666653).

Almost surely, 2^{55505055555505} is an apocalyptic number.

It is an amenable number.

55505055555505 is a deficient number, since it is larger than the sum of its proper divisors (11101011111107).

55505055555505 is a wasteful number, since it uses less digits than its factorization.

55505055555505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101011111106.

The product of its (nonzero) digits is 48828125, while the sum is 55.

The spelling of 55505055555505 in words is "fifty-five trillion, five hundred five billion, fifty-five million, five hundred fifty-five thousand, five hundred five".