64761841 has 2 divisors, whose sum is σ = 64761842. Its totient is φ = 64761840.

The previous prime is 64761839. The next prime is 64761847. The reversal of 64761841 is 14816746.

It is a happy number.

64761841 is nontrivially palindromic in base 6.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 2903616 = 7865^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 64761841 - 2¹ = 64761839 is a prime.

Together with 64761839, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64761841.

It is not a weakly prime, because it can be changed into another prime (64761847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32380920 + 32380921.

It is an arithmetic number, because the mean of its divisors is an integer number (32380921).

Almost surely, 2^64761841 is an apocalyptic number.

It is an amenable number.

64761841 is a deficient number, since it is larger than the sum of its proper divisors (1).

64761841 is an equidigital number, since it uses as much as digits as its factorization.

64761841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 64761841 is about 8047.4742000208. The cubic root of 64761841 is about 401.5809123091.

The spelling of 64761841 in words is "sixty-four million, seven hundred sixty-one thousand, eight hundred forty-one".