51017651651 has 2 divisors, whose sum is σ = 51017651652. Its totient is φ = 51017651650.

The previous prime is 51017651617. The next prime is 51017651683. The reversal of 51017651651 is 15615671015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51017651651 - 2¹⁰ = 51017650627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51017651351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25508825825 + 25508825826.

It is an arithmetic number, because the mean of its divisors is an integer number (25508825826).

Almost surely, 2^51017651651 is an apocalyptic number.

51017651651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51017651651 is an equidigital number, since it uses as much as digits as its factorization.

51017651651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 38.

The spelling of 51017651651 in words is "fifty-one billion, seventeen million, six hundred fifty-one thousand, six hundred fifty-one".