64311553 has 2 divisors, whose sum is σ = 64311554. Its totient is φ = 64311552.

The previous prime is 64311517. The next prime is 64311581. The reversal of 64311553 is 35511346.

It is an a-pointer prime, because the next prime (64311581) can be obtained adding 64311553 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47238129 + 17073424 = 6873^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 64311553 - 2²⁵ = 30757121 is a prime.

It is not a weakly prime, because it can be changed into another prime (64311253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32155776 + 32155777.

It is an arithmetic number, because the mean of its divisors is an integer number (32155777).

Almost surely, 2^64311553 is an apocalyptic number.

It is an amenable number.

64311553 is a deficient number, since it is larger than the sum of its proper divisors (1).

64311553 is an equidigital number, since it uses as much as digits as its factorization.

64311553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The square root of 64311553 is about 8019.4484224291. The cubic root of 64311553 is about 400.6480183636.

Adding to 64311553 its reverse (35511346), we get a palindrome (99822899).

The spelling of 64311553 in words is "sixty-four million, three hundred eleven thousand, five hundred fifty-three".