51605000010 has 48 divisors (see below), whose sum is σ = 137799306216. Its totient is φ = 13389404544.

The previous prime is 51605000009. The next prime is 51605000039. The reversal of 51605000010 is 1000050615.

51605000010 is a `hidden beast` number, since 5 + 160 + 500 + 0 + 0 + 1 + 0 = 666.

51605000010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51249262689 + 355737321 = 226383^2 + 18861^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7745169 + ... + 7751828.

Almost surely, 2^51605000010 is an apocalyptic number.

51605000010 is an abundant number, since it is smaller than the sum of its proper divisors (86194306206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51605000010 is a wasteful number, since it uses less digits than its factorization.

51605000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15497047 (or 15497044 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

Adding to 51605000010 its reverse (1000050615), we get a palindrome (52605050625).

The spelling of 51605000010 in words is "fifty-one billion, six hundred five million, ten", and thus it is an aban number.