64451161 has 2 divisors, whose sum is σ = 64451162. Its totient is φ = 64451160.

The previous prime is 64451159. The next prime is 64451171. The reversal of 64451161 is 16115446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33582025 + 30869136 = 5795^2 + 5556^2 .

It is a cyclic number.

It is not a de Polignac number, because 64451161 - 2¹ = 64451159 is a prime.

Together with 64451159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64451171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32225580 + 32225581.

It is an arithmetic number, because the mean of its divisors is an integer number (32225581).

Almost surely, 2^64451161 is an apocalyptic number.

It is an amenable number.

64451161 is a deficient number, since it is larger than the sum of its proper divisors (1).

64451161 is an equidigital number, since it uses as much as digits as its factorization.

64451161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 64451161 is about 8028.1480429798. The cubic root of 64451161 is about 400.9377187411.

The spelling of 64451161 in words is "sixty-four million, four hundred fifty-one thousand, one hundred sixty-one".