51304734643 has 2 divisors, whose sum is σ = 51304734644. Its totient is φ = 51304734642.

The previous prime is 51304734623. The next prime is 51304734737. The reversal of 51304734643 is 34643740315.

51304734643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51304734643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51304734596 and 51304734605.

It is not a weakly prime, because it can be changed into another prime (51304734623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25652367321 + 25652367322.

It is an arithmetic number, because the mean of its divisors is an integer number (25652367322).

Almost surely, 2^51304734643 is an apocalyptic number.

51304734643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51304734643 is an equidigital number, since it uses as much as digits as its factorization.

51304734643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 51304734643 in words is "fifty-one billion, three hundred four million, seven hundred thirty-four thousand, six hundred forty-three".