51263617193 has 2 divisors, whose sum is σ = 51263617194. Its totient is φ = 51263617192.

The previous prime is 51263617189. The next prime is 51263617199. The reversal of 51263617193 is 39171636215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37776975769 + 13486641424 = 194363^2 + 116132^2 .

It is a cyclic number.

It is not a de Polignac number, because 51263617193 - 2² = 51263617189 is a prime.

It is not a weakly prime, because it can be changed into another prime (51263617199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25631808596 + 25631808597.

It is an arithmetic number, because the mean of its divisors is an integer number (25631808597).

Almost surely, 2^51263617193 is an apocalyptic number.

It is an amenable number.

51263617193 is a deficient number, since it is larger than the sum of its proper divisors (1).

51263617193 is an equidigital number, since it uses as much as digits as its factorization.

51263617193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The spelling of 51263617193 in words is "fifty-one billion, two hundred sixty-three million, six hundred seventeen thousand, one hundred ninety-three".