64217794663 has 16 divisors (see below), whose sum is σ = 70614479232. Its totient is φ = 57914532000.

The previous prime is 64217794657. The next prime is 64217794673. The reversal of 64217794663 is 36649771246.

It is a cyclic number.

It is not a de Polignac number, because 64217794663 - 2²⁹ = 63680923751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64217794603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5788720 + ... + 5799802.

It is an arithmetic number, because the mean of its divisors is an integer number (4413404952).

Almost surely, 2^64217794663 is an apocalyptic number.

64217794663 is a deficient number, since it is larger than the sum of its proper divisors (6396684569).

64217794663 is a wasteful number, since it uses less digits than its factorization.

64217794663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15246.

The product of its digits is 9144576, while the sum is 55.

The spelling of 64217794663 in words is "sixty-four billion, two hundred seventeen million, seven hundred ninety-four thousand, six hundred sixty-three".