51513616205 has 16 divisors (see below), whose sum is σ = 63819268608. Its totient is φ = 39875976000.

The previous prime is 51513616163. The next prime is 51513616211. The reversal of 51513616205 is 50261631515.

It is not a de Polignac number, because 51513616205 - 2¹⁴ = 51513599821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367270 + ... + 1404440.

It is an arithmetic number, because the mean of its divisors is an integer number (3988704288).

Almost surely, 2^51513616205 is an apocalyptic number.

It is an amenable number.

51513616205 is a deficient number, since it is larger than the sum of its proper divisors (12305652403).

51513616205 is a wasteful number, since it uses less digits than its factorization.

51513616205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46148.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 51513616205 in words is "fifty-one billion, five hundred thirteen million, six hundred sixteen thousand, two hundred five".