51263617129 has 2 divisors, whose sum is σ = 51263617130. Its totient is φ = 51263617128.

The previous prime is 51263617073. The next prime is 51263617159. The reversal of 51263617129 is 92171636215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47576334400 + 3687282729 = 218120^2 + 60723^2 .

It is a cyclic number.

It is not a de Polignac number, because 51263617129 - 2⁷ = 51263617001 is a prime.

It is a super-2 number, since 2×51263617129² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51263617159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25631808564 + 25631808565.

It is an arithmetic number, because the mean of its divisors is an integer number (25631808565).

Almost surely, 2^51263617129 is an apocalyptic number.

It is an amenable number.

51263617129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51263617129 is an equidigital number, since it uses as much as digits as its factorization.

51263617129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The spelling of 51263617129 in words is "fifty-one billion, two hundred sixty-three million, six hundred seventeen thousand, one hundred twenty-nine".