51011000647 has 2 divisors, whose sum is σ = 51011000648. Its totient is φ = 51011000646.

The previous prime is 51011000617. The next prime is 51011000669. The reversal of 51011000647 is 74600011015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51011000647 - 2¹⁹ = 51010476359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51011000617) 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, 25505500323 + 25505500324.

It is an arithmetic number, because the mean of its divisors is an integer number (25505500324).

Almost surely, 2^51011000647 is an apocalyptic number.

51011000647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51011000647 is an equidigital number, since it uses as much as digits as its factorization.

51011000647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 51011000647 in words is "fifty-one billion, eleven million, six hundred forty-seven", and thus it is an aban number.