51171567136 has 24 divisors (see below), whose sum is σ = 103466836620. Its totient is φ = 24894275328.

The previous prime is 51171567133. The next prime is 51171567157. The reversal of 51171567136 is 63176517115.

It can be written as a sum of positive squares in 2 ways, for example, as 49204112400 + 1967454736 = 221820^2 + 44356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51171567092 and 51171567101.

It is not an unprimeable number, because it can be changed into a prime (51171567133) by changing a digit.

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, 21608431 + ... + 21610798.

Almost surely, 2^51171567136 is an apocalyptic number.

It is an amenable number.

51171567136 is an abundant number, since it is smaller than the sum of its proper divisors (52295269484).

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

51171567136 is a wasteful number, since it uses less digits than its factorization.

51171567136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43219276 (or 43219268 counting only the distinct ones).

The product of its digits is 132300, while the sum is 43.

The spelling of 51171567136 in words is "fifty-one billion, one hundred seventy-one million, five hundred sixty-seven thousand, one hundred thirty-six".