51406161885049 has 2 divisors, whose sum is σ = 51406161885050. Its totient is φ = 51406161885048.

The previous prime is 51406161885041. The next prime is 51406161885097. The reversal of 51406161885049 is 94058816160415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30408166209600 + 20997995675449 = 5514360^2 + 4582357^2 .

It is a cyclic number.

It is not a de Polignac number, because 51406161885049 - 2³ = 51406161885041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51406161884984 and 51406161885002.

It is not a weakly prime, because it can be changed into another prime (51406161885041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25703080942524 + 25703080942525.

It is an arithmetic number, because the mean of its divisors is an integer number (25703080942525).

Almost surely, 2^{51406161885049} is an apocalyptic number.

It is an amenable number.

51406161885049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51406161885049 is an equidigital number, since it uses as much as digits as its factorization.

51406161885049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8294400, while the sum is 58.

The spelling of 51406161885049 in words is "fifty-one trillion, four hundred six billion, one hundred sixty-one million, eight hundred eighty-five thousand, forty-nine".