551957169161 has 2 divisors, whose sum is σ = 551957169162. Its totient is φ = 551957169160.

The previous prime is 551957169097. The next prime is 551957169217. The reversal of 551957169161 is 161961759155.

It is a happy number.

It is an a-pointer prime, because the next prime (551957169217) can be obtained adding 551957169161 to its sum of digits (56).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285737287936 + 266219881225 = 534544^2 + 515965^2 .

It is a cyclic number.

It is not a de Polignac number, because 551957169161 - 2⁶ = 551957169097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551957169097 and 551957169106.

It is not a weakly prime, because it can be changed into another prime (551957169661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275978584580 + 275978584581.

It is an arithmetic number, because the mean of its divisors is an integer number (275978584581).

Almost surely, 2^551957169161 is an apocalyptic number.

It is an amenable number.

551957169161 is a deficient number, since it is larger than the sum of its proper divisors (1).

551957169161 is an equidigital number, since it uses as much as digits as its factorization.

551957169161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2551500, while the sum is 56.

The spelling of 551957169161 in words is "five hundred fifty-one billion, nine hundred fifty-seven million, one hundred sixty-nine thousand, one hundred sixty-one".