51550605506 has 8 divisors (see below), whose sum is σ = 77365958544. Its totient is φ = 25761952660.

The previous prime is 51550605493. The next prime is 51550605517. The reversal of 51550605506 is 60550605515.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51550605506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6670220 + ... + 6677943.

It is an arithmetic number, because the mean of its divisors is an integer number (9670744818).

Almost surely, 2^51550605506 is an apocalyptic number.

51550605506 is a deficient number, since it is larger than the sum of its proper divisors (25815353038).

51550605506 is a wasteful number, since it uses less digits than its factorization.

51550605506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13350096.

The product of its (nonzero) digits is 112500, while the sum is 38.

Subtracting 51550605506 from its reverse (60550605515), we obtain a palindrome (9000000009).

The spelling of 51550605506 in words is "fifty-one billion, five hundred fifty million, six hundred five thousand, five hundred six".