64340651 has 2 divisors, whose sum is σ = 64340652. Its totient is φ = 64340650.

The previous prime is 64340623. The next prime is 64340657. The reversal of 64340651 is 15604346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64340651 - 2²² = 60146347 is a prime.

It is a super-2 number, since 2×64340651² = 8279438742207602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64340657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32170325 + 32170326.

It is an arithmetic number, because the mean of its divisors is an integer number (32170326).

Almost surely, 2^64340651 is an apocalyptic number.

64340651 is a deficient number, since it is larger than the sum of its proper divisors (1).

64340651 is an equidigital number, since it uses as much as digits as its factorization.

64340651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 64340651 is about 8021.2624318121. The cubic root of 64340651 is about 400.7084341453.

Adding to 64340651 its reverse (15604346), we get a palindrome (79944997).

The spelling of 64340651 in words is "sixty-four million, three hundred forty thousand, six hundred fifty-one".