51387885007 has 2 divisors, whose sum is σ = 51387885008. Its totient is φ = 51387885006.

The previous prime is 51387884953. The next prime is 51387885049. The reversal of 51387885007 is 70058878315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51387885007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51387883007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25693942503 + 25693942504.

It is an arithmetic number, because the mean of its divisors is an integer number (25693942504).

Almost surely, 2^51387885007 is an apocalyptic number.

51387885007 is a deficient number, since it is larger than the sum of its proper divisors (1).

51387885007 is an equidigital number, since it uses as much as digits as its factorization.

51387885007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 51387885007 in words is "fifty-one billion, three hundred eighty-seven million, eight hundred eighty-five thousand, seven".