51611650507 has 2 divisors, whose sum is σ = 51611650508. Its totient is φ = 51611650506.

The previous prime is 51611650459. The next prime is 51611650513. The reversal of 51611650507 is 70505611615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51611650507 - 2¹⁹ = 51611126219 is a prime.

It is not a weakly prime, because it can be changed into another prime (51611650537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25805825253 + 25805825254.

It is an arithmetic number, because the mean of its divisors is an integer number (25805825254).

Almost surely, 2^51611650507 is an apocalyptic number.

51611650507 is a deficient number, since it is larger than the sum of its proper divisors (1).

51611650507 is an equidigital number, since it uses as much as digits as its factorization.

51611650507 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 37.

The spelling of 51611650507 in words is "fifty-one billion, six hundred eleven million, six hundred fifty thousand, five hundred seven".