64455344431 has 8 divisors (see below), whose sum is σ = 67926366720. Its totient is φ = 60992185752.

The previous prime is 64455344423. The next prime is 64455344521. The reversal of 64455344431 is 13444355446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64455344431 - 2³ = 64455344423 is a prime.

It is a super-3 number, since 3×64455344431³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64455344231) 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 7 ways as a sum of consecutive naturals, for example, 1949065 + ... + 1981858.

It is an arithmetic number, because the mean of its divisors is an integer number (8490795840).

Almost surely, 2^64455344431 is an apocalyptic number.

64455344431 is a deficient number, since it is larger than the sum of its proper divisors (3471022289).

64455344431 is a wasteful number, since it uses less digits than its factorization.

64455344431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931805.

The product of its digits is 1382400, while the sum is 43.

Adding to 64455344431 its reverse (13444355446), we get a palindrome (77899699877).

The spelling of 64455344431 in words is "sixty-four billion, four hundred fifty-five million, three hundred forty-four thousand, four hundred thirty-one".