64668548193 has 16 divisors (see below), whose sum is σ = 86676004800. Its totient is φ = 42887245824.

The previous prime is 64668548177. The next prime is 64668548213. The reversal of 64668548193 is 39184586646.

It is not a de Polignac number, because 64668548193 - 2⁴ = 64668548177 is a prime.

It is a super-2 number, since 2×64668548193² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64668540193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439233 + ... + 567681.

It is an arithmetic number, because the mean of its divisors is an integer number (5417250300).

Almost surely, 2^64668548193 is an apocalyptic number.

It is an amenable number.

64668548193 is a deficient number, since it is larger than the sum of its proper divisors (22007456607).

64668548193 is a wasteful number, since it uses less digits than its factorization.

64668548193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129328.

The product of its digits is 29859840, while the sum is 60.

The spelling of 64668548193 in words is "sixty-four billion, six hundred sixty-eight million, five hundred forty-eight thousand, one hundred ninety-three".