51031872643 has 2 divisors, whose sum is σ = 51031872644. Its totient is φ = 51031872642.

The previous prime is 51031872631. The next prime is 51031872653. The reversal of 51031872643 is 34627813015.

51031872643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51031872643 - 2¹⁷ = 51031741571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51031872596 and 51031872605.

It is not a weakly prime, because it can be changed into another prime (51031872653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515936321 + 25515936322.

It is an arithmetic number, because the mean of its divisors is an integer number (25515936322).

Almost surely, 2^51031872643 is an apocalyptic number.

51031872643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031872643 is an equidigital number, since it uses as much as digits as its factorization.

51031872643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 51031872643 in words is "fifty-one billion, thirty-one million, eight hundred seventy-two thousand, six hundred forty-three".