6400064653 has 2 divisors, whose sum is σ = 6400064654. Its totient is φ = 6400064652.

The previous prime is 6400064641. The next prime is 6400064689. The reversal of 6400064653 is 3564600046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6399520009 + 544644 = 79997^2 + 738^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400064653 - 2²⁵ = 6366510221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6400061653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200032326 + 3200032327.

It is an arithmetic number, because the mean of its divisors is an integer number (3200032327).

Almost surely, 2^6400064653 is an apocalyptic number.

It is an amenable number.

6400064653 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400064653 is an equidigital number, since it uses as much as digits as its factorization.

6400064653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 6400064653 is about 80000.4040802295. The cubic root of 6400064653 is about 1856.6417853541.

Adding to 6400064653 its reverse (3564600046), we get a palindrome (9964664699).

The spelling of 6400064653 in words is "six billion, four hundred million, sixty-four thousand, six hundred fifty-three".