51884185585 has 4 divisors (see below), whose sum is σ = 62261022708. Its totient is φ = 41507348464.

The previous prime is 51884185583. The next prime is 51884185601. The reversal of 51884185585 is 58558148815.

51884185585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38419136064 + 13465049521 = 196008^2 + 116039^2 .

It is a cyclic number.

It is not a de Polignac number, because 51884185585 - 2¹ = 51884185583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51884185583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5188418554 + ... + 5188418563.

It is an arithmetic number, because the mean of its divisors is an integer number (15565255677).

Almost surely, 2^51884185585 is an apocalyptic number.

It is an amenable number.

51884185585 is a deficient number, since it is larger than the sum of its proper divisors (10376837123).

51884185585 is a wasteful number, since it uses less digits than its factorization.

51884185585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376837122.

The product of its digits is 10240000, while the sum is 58.

The spelling of 51884185585 in words is "fifty-one billion, eight hundred eighty-four million, one hundred eighty-five thousand, five hundred eighty-five".