64911317545 has 8 divisors (see below), whose sum is σ = 79056172224. Its totient is φ = 51153993264.

The previous prime is 64911317543. The next prime is 64911317579. The reversal of 64911317545 is 54571311946.

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 64911317545 - 2¹ = 64911317543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64911317495 and 64911317504.

It is not an unprimeable number, because it can be changed into a prime (64911317543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96882229 + ... + 96882898.

It is an arithmetic number, because the mean of its divisors is an integer number (9882021528).

Almost surely, 2^64911317545 is an apocalyptic number.

It is an amenable number.

64911317545 is a deficient number, since it is larger than the sum of its proper divisors (14144854679).

64911317545 is a wasteful number, since it uses less digits than its factorization.

64911317545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193765199.

The product of its digits is 453600, while the sum is 46.

The spelling of 64911317545 in words is "sixty-four billion, nine hundred eleven million, three hundred seventeen thousand, five hundred forty-five".