51106420326989 has 2 divisors, whose sum is σ = 51106420326990. Its totient is φ = 51106420326988.

The previous prime is 51106420326967. The next prime is 51106420327019. The reversal of 51106420326989 is 98962302460115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37856332562500 + 13250087764489 = 6152750^2 + 3640067^2 .

It is a cyclic number.

It is not a de Polignac number, because 51106420326989 - 2²⁰ = 51106419278413 is a prime.

It is a super-2 number, since 2×51106420326989² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51106420326959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25553210163494 + 25553210163495.

It is an arithmetic number, because the mean of its divisors is an integer number (25553210163495).

Almost surely, 2^{51106420326989} is an apocalyptic number.

It is an amenable number.

51106420326989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51106420326989 is an equidigital number, since it uses as much as digits as its factorization.

51106420326989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 51106420326989 in words is "fifty-one trillion, one hundred six billion, four hundred twenty million, three hundred twenty-six thousand, nine hundred eighty-nine".