51056330643 has 16 divisors (see below), whose sum is σ = 79620009600. Its totient is φ = 32246103240.

The previous prime is 51056330551. The next prime is 51056330651. The reversal of 51056330643 is 34603365015.

51056330643 is a `hidden beast` number, since 5 + 1 + 0 + 5 + 6 + 3 + 3 + 0 + 643 = 666.

It is not a de Polignac number, because 51056330643 - 2⁸ = 51056330387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51056330598 and 51056330607.

It is not an unprimeable number, because it can be changed into a prime (51056330443) 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, 49761993 + ... + 49763018.

It is an arithmetic number, because the mean of its divisors is an integer number (4976250600).

Almost surely, 2^51056330643 is an apocalyptic number.

51056330643 is a deficient number, since it is larger than the sum of its proper divisors (28563678957).

51056330643 is a wasteful number, since it uses less digits than its factorization.

51056330643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99525039 (or 99525033 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 51056330643 its reverse (34603365015), we get a palindrome (85659695658).

The spelling of 51056330643 in words is "fifty-one billion, fifty-six million, three hundred thirty thousand, six hundred forty-three".