51517219605 has 16 divisors (see below), whose sum is σ = 82552268544. Its totient is φ = 27434278080.

The previous prime is 51517219603. The next prime is 51517219639. The reversal of 51517219605 is 50691271515.

It is not a de Polignac number, because 51517219605 - 2¹ = 51517219603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51517219603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2588029 + ... + 2607858.

It is an arithmetic number, because the mean of its divisors is an integer number (5159516784).

Almost surely, 2^51517219605 is an apocalyptic number.

It is an amenable number.

51517219605 is a deficient number, since it is larger than the sum of its proper divisors (31035048939).

51517219605 is a wasteful number, since it uses less digits than its factorization.

51517219605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196556.

The product of its (nonzero) digits is 94500, while the sum is 42.

The spelling of 51517219605 in words is "fifty-one billion, five hundred seventeen million, two hundred nineteen thousand, six hundred five".