64145813 has 2 divisors, whose sum is σ = 64145814. Its totient is φ = 64145812.

The previous prime is 64145801. The next prime is 64145819. The reversal of 64145813 is 31854146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36024004 + 28121809 = 6002^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 64145813 - 2⁴ = 64145797 is a prime.

It is a super-2 number, since 2×64145813² = 8229370650861938, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64145813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64145819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32072906 + 32072907.

It is an arithmetic number, because the mean of its divisors is an integer number (32072907).

Almost surely, 2^64145813 is an apocalyptic number.

It is an amenable number.

64145813 is a deficient number, since it is larger than the sum of its proper divisors (1).

64145813 is an equidigital number, since it uses as much as digits as its factorization.

64145813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 64145813 is about 8009.1081276257. The cubic root of 64145813 is about 400.3035466736.

Adding to 64145813 its reverse (31854146), we get a palindrome (95999959).

The spelling of 64145813 in words is "sixty-four million, one hundred forty-five thousand, eight hundred thirteen".