51051501719989 has 2 divisors, whose sum is σ = 51051501719990. Its totient is φ = 51051501719988.

The previous prime is 51051501719887. The next prime is 51051501720077. The reversal of 51051501719989 is 98991710515015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44817441543889 + 6234060176100 = 6694583^2 + 2496810^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051501719989 - 2¹³ = 51051501711797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51051501714989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25525750859994 + 25525750859995.

It is an arithmetic number, because the mean of its divisors is an integer number (25525750859995).

Almost surely, 2^{51051501719989} is an apocalyptic number.

It is an amenable number.

51051501719989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51051501719989 is an equidigital number, since it uses as much as digits as its factorization.

51051501719989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103000, while the sum is 61.

The spelling of 51051501719989 in words is "fifty-one trillion, fifty-one billion, five hundred one million, seven hundred nineteen thousand, nine hundred eighty-nine".