651416361161 has 2 divisors, whose sum is σ = 651416361162. Its totient is φ = 651416361160.

The previous prime is 651416361157. The next prime is 651416361209. The reversal of 651416361161 is 161163614156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534096410761 + 117319950400 = 730819^2 + 342520^2 .

It is a cyclic number.

It is not a de Polignac number, because 651416361161 - 2² = 651416361157 is a prime.

It is not a weakly prime, because it can be changed into another prime (651416361151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325708180580 + 325708180581.

It is an arithmetic number, because the mean of its divisors is an integer number (325708180581).

Almost surely, 2^651416361161 is an apocalyptic number.

It is an amenable number.

651416361161 is a deficient number, since it is larger than the sum of its proper divisors (1).

651416361161 is an equidigital number, since it uses as much as digits as its factorization.

651416361161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The spelling of 651416361161 in words is "six hundred fifty-one billion, four hundred sixteen million, three hundred sixty-one thousand, one hundred sixty-one".