55551536605 has 4 divisors (see below), whose sum is σ = 66661843932. Its totient is φ = 44441229280.

The previous prime is 55551536567. The next prime is 55551536659. The reversal of 55551536605 is 50663515555.

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 41262203161 + 14289333444 = 203131^2 + 119538^2 .

It is not a de Polignac number, because 55551536605 - 2⁹ = 55551536093 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 3 ways as a sum of consecutive naturals, for example, 5555153656 + ... + 5555153665.

It is an arithmetic number, because the mean of its divisors is an integer number (16665460983).

Almost surely, 2^55551536605 is an apocalyptic number.

It is an amenable number.

55551536605 is a deficient number, since it is larger than the sum of its proper divisors (11110307327).

55551536605 is a wasteful number, since it uses less digits than its factorization.

55551536605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110307326.

The product of its (nonzero) digits is 1687500, while the sum is 46.

The spelling of 55551536605 in words is "fifty-five billion, five hundred fifty-one million, five hundred thirty-six thousand, six hundred five".