51534642851 has 2 divisors, whose sum is σ = 51534642852. Its totient is φ = 51534642850.

The previous prime is 51534642751. The next prime is 51534642977. The reversal of 51534642851 is 15824643515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51534642851 is a prime.

It is not a weakly prime, because it can be changed into another prime (51534642151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767321425 + 25767321426.

It is an arithmetic number, because the mean of its divisors is an integer number (25767321426).

Almost surely, 2^51534642851 is an apocalyptic number.

51534642851 is a deficient number, since it is larger than the sum of its proper divisors (1).

51534642851 is an equidigital number, since it uses as much as digits as its factorization.

51534642851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 44.

The spelling of 51534642851 in words is "fifty-one billion, five hundred thirty-four million, six hundred forty-two thousand, eight hundred fifty-one".