64455216533 has 4 divisors (see below), whose sum is σ = 65671352748. Its totient is φ = 63239080320.

The previous prime is 64455216509. The next prime is 64455216569. The reversal of 64455216533 is 33561255446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49899517924 + 14555698609 = 223382^2 + 120647^2 .

It is a cyclic number.

It is not a de Polignac number, because 64455216533 - 2⁸ = 64455216277 is a prime.

It is a super-3 number, since 3×64455216533³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64455216433) 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 in 3 ways as a sum of consecutive naturals, for example, 608068028 + ... + 608068133.

It is an arithmetic number, because the mean of its divisors is an integer number (16417838187).

Almost surely, 2^64455216533 is an apocalyptic number.

It is an amenable number.

64455216533 is a deficient number, since it is larger than the sum of its proper divisors (1216136215).

64455216533 is a wasteful number, since it uses less digits than its factorization.

64455216533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216136214.

The product of its digits is 1296000, while the sum is 44.

The spelling of 64455216533 in words is "sixty-four billion, four hundred fifty-five million, two hundred sixteen thousand, five hundred thirty-three".