51555050005 has 8 divisors (see below), whose sum is σ = 63999372600. Its totient is φ = 39821831616.

The previous prime is 51555049991. The next prime is 51555050033. The reversal of 51555050005 is 50005055515.

It can be written as a sum of positive squares in 4 ways, for example, as 6195421521 + 45359628484 = 78711^2 + 212978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51555050005 - 2²¹ = 51552952853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177775890 + ... + 177776179.

It is an arithmetic number, because the mean of its divisors is an integer number (7999921575).

Almost surely, 2^51555050005 is an apocalyptic number.

It is an amenable number.

51555050005 is a deficient number, since it is larger than the sum of its proper divisors (12444322595).

51555050005 is a wasteful number, since it uses less digits than its factorization.

51555050005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355552103.

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 51555050005 in words is "fifty-one billion, five hundred fifty-five million, fifty thousand, five".