64276729668 has 72 divisors (see below), whose sum is σ = 171071482400. Its totient is φ = 20292840576.

The previous prime is 64276729667. The next prime is 64276729669. The reversal of 64276729668 is 86692767246.

64276729668 is a `hidden beast` number, since 6 + 427 + 67 + 2 + 96 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (64276729667) and next prime (64276729669).

It is not an unprimeable number, because it can be changed into a prime (64276729663) 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 23 ways as a sum of consecutive naturals, for example, 3488103 + ... + 3506481.

Almost surely, 2^64276729668 is an apocalyptic number.

It is an amenable number.

64276729668 is an abundant number, since it is smaller than the sum of its proper divisors (106794752732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64276729668 is a wasteful number, since it uses less digits than its factorization.

64276729668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23521 (or 23516 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 64276729668 in words is "sixty-four billion, two hundred seventy-six million, seven hundred twenty-nine thousand, six hundred sixty-eight".