64423633346505 has 40 divisors (see below), whose sum is σ = 119210661106944. Its totient is φ = 33250907527200.

The previous prime is 64423633346497. The next prime is 64423633346549. The reversal of 64423633346505 is 50564333632446.

64423633346505 is a `hidden beast` number, since 6 + 4 + 4 + 2 + 3 + 63 + 33 + 46 + 505 = 666.

It is not a de Polignac number, because 64423633346505 - 2³ = 64423633346497 is a prime.

It is a super-2 number, since 2×64423633346505² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2565643891 + ... + 2565669000.

Almost surely, 2^{64423633346505} is an apocalyptic number.

It is an amenable number.

64423633346505 is a deficient number, since it is larger than the sum of its proper divisors (54787027760439).

64423633346505 is a wasteful number, since it uses less digits than its factorization.

64423633346505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131312939 (or 5131312930 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 54.

The spelling of 64423633346505 in words is "sixty-four trillion, four hundred twenty-three billion, six hundred thirty-three million, three hundred forty-six thousand, five hundred five".