51810233647 has 2 divisors, whose sum is σ = 51810233648. Its totient is φ = 51810233646.

The previous prime is 51810233621. The next prime is 51810233723. The reversal of 51810233647 is 74633201815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51810233647 - 2¹⁹ = 51809709359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51810233147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25905116823 + 25905116824.

It is an arithmetic number, because the mean of its divisors is an integer number (25905116824).

Almost surely, 2^51810233647 is an apocalyptic number.

51810233647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51810233647 is an equidigital number, since it uses as much as digits as its factorization.

51810233647 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 51810233647 in words is "fifty-one billion, eight hundred ten million, two hundred thirty-three thousand, six hundred forty-seven".