64540534299217 has 8 divisors (see below), whose sum is σ = 68337461503872. Its totient is φ = 60743654337600.

The previous prime is 64540534299173. The next prime is 64540534299223. The reversal of 64540534299217 is 71299243504546.

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 64540534299217 - 2⁴³ = 55744441277009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64540534299247) 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, 8978709 + ... + 14480962.

It is an arithmetic number, because the mean of its divisors is an integer number (8542182687984).

Almost surely, 2^{64540534299217} is an apocalyptic number.

It is an amenable number.

64540534299217 is a deficient number, since it is larger than the sum of its proper divisors (3796927204655).

64540534299217 is a wasteful number, since it uses less digits than its factorization.

64540534299217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23621519.

The product of its (nonzero) digits is 65318400, while the sum is 61.

The spelling of 64540534299217 in words is "sixty-four trillion, five hundred forty billion, five hundred thirty-four million, two hundred ninety-nine thousand, two hundred seventeen".