51055561005605 has 32 divisors (see below), whose sum is σ = 66131804626944. Its totient is φ = 37615573069056.

The previous prime is 51055561005593. The next prime is 51055561005643. The reversal of 51055561005605 is 50650016555015.

It is a cyclic number.

It is not a de Polignac number, because 51055561005605 - 2²⁰ = 51055559957029 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 31 ways as a sum of consecutive naturals, for example, 125372099 + ... + 125778671.

It is an arithmetic number, because the mean of its divisors is an integer number (2066618894592).

Almost surely, 2^{51055561005605} is an apocalyptic number.

It is an amenable number.

51055561005605 is a deficient number, since it is larger than the sum of its proper divisors (15076243621339).

51055561005605 is a wasteful number, since it uses less digits than its factorization.

51055561005605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411045.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 51055561005605 in words is "fifty-one trillion, fifty-five billion, five hundred sixty-one million, five thousand, six hundred five".