64405771 has 2 divisors, whose sum is σ = 64405772. Its totient is φ = 64405770.

The previous prime is 64405751. The next prime is 64405853. The reversal of 64405771 is 17750446.

It is a happy number.

64405771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64405771 - 2⁷ = 64405643 is a prime.

It is equal to p_3807682 and since 64405771 and 3807682 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64405751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32202885 + 32202886.

It is an arithmetic number, because the mean of its divisors is an integer number (32202886).

Almost surely, 2^64405771 is an apocalyptic number.

64405771 is a deficient number, since it is larger than the sum of its proper divisors (1).

64405771 is an equidigital number, since it uses as much as digits as its factorization.

64405771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 64405771 is about 8025.3206166483. The cubic root of 64405771 is about 400.8435759484.

The spelling of 64405771 in words is "sixty-four million, four hundred five thousand, seven hundred seventy-one".