64188268105663 has 4 divisors (see below), whose sum is σ = 69125827190728. Its totient is φ = 59250709020600.

The previous prime is 64188268105613. The next prime is 64188268105667. The reversal of 64188268105663 is 36650186288146.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64188268105663 - 2²⁹ = 64187731234751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64188268105595 and 64188268105604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64188268105667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2468779542513 + ... + 2468779542538.

It is an arithmetic number, because the mean of its divisors is an integer number (17281456797682).

Almost surely, 2^{64188268105663} is an apocalyptic number.

64188268105663 is a deficient number, since it is larger than the sum of its proper divisors (4937559085065).

64188268105663 is a wasteful number, since it uses less digits than its factorization.

64188268105663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937559085064.

The product of its (nonzero) digits is 79626240, while the sum is 64.

The spelling of 64188268105663 in words is "sixty-four trillion, one hundred eighty-eight billion, two hundred sixty-eight million, one hundred five thousand, six hundred sixty-three".