51729655696 has 10 divisors (see below), whose sum is σ = 100226207942. Its totient is φ = 25864827840.

The previous prime is 51729655687. The next prime is 51729655777. The reversal of 51729655696 is 69655692715.

It can be written as a sum of positive squares in only one way, i.e., 49255588096 + 2474067600 = 221936^2 + 49740^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1616551725 + ... + 1616551756.

Almost surely, 2^51729655696 is an apocalyptic number.

It is an amenable number.

51729655696 is a deficient number, since it is larger than the sum of its proper divisors (48496552246).

51729655696 is a wasteful number, since it uses less digits than its factorization.

51729655696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233103489 (or 3233103483 counting only the distinct ones).

The product of its digits is 30618000, while the sum is 61.

The spelling of 51729655696 in words is "fifty-one billion, seven hundred twenty-nine million, six hundred fifty-five thousand, six hundred ninety-six".