51986689211 has 2 divisors, whose sum is σ = 51986689212. Its totient is φ = 51986689210.

The previous prime is 51986689201. The next prime is 51986689217. The reversal of 51986689211 is 11298668915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51986689211 - 2⁶ = 51986689147 is a prime.

It is a super-2 number, since 2×51986689211² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51986689217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25993344605 + 25993344606.

It is an arithmetic number, because the mean of its divisors is an integer number (25993344606).

Almost surely, 2^51986689211 is an apocalyptic number.

51986689211 is a deficient number, since it is larger than the sum of its proper divisors (1).

51986689211 is an equidigital number, since it uses as much as digits as its factorization.

51986689211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 56.

The spelling of 51986689211 in words is "fifty-one billion, nine hundred eighty-six million, six hundred eighty-nine thousand, two hundred eleven".