51551606507 has 2 divisors, whose sum is σ = 51551606508. Its totient is φ = 51551606506.

The previous prime is 51551606503. The next prime is 51551606527. The reversal of 51551606507 is 70560615515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51551606507 - 2² = 51551606503 is a prime.

It is not a weakly prime, because it can be changed into another prime (51551606503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775803253 + 25775803254.

It is an arithmetic number, because the mean of its divisors is an integer number (25775803254).

Almost surely, 2^51551606507 is an apocalyptic number.

51551606507 is a deficient number, since it is larger than the sum of its proper divisors (1).

51551606507 is an equidigital number, since it uses as much as digits as its factorization.

51551606507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157500, while the sum is 41.

The spelling of 51551606507 in words is "fifty-one billion, five hundred fifty-one million, six hundred six thousand, five hundred seven".