64786810428 has 36 divisors (see below), whose sum is σ = 167760972288. Its totient is φ = 21068880960.

The previous prime is 64786810421. The next prime is 64786810483. The reversal of 64786810428 is 82401868746.

64786810428 is a `hidden beast` number, since 6 + 478 + 68 + 104 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64786810421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21945276 + ... + 21948227.

It is an arithmetic number, because the mean of its divisors is an integer number (4660027008).

Almost surely, 2^64786810428 is an apocalyptic number.

It is an amenable number.

64786810428 is an abundant number, since it is smaller than the sum of its proper divisors (102974161860).

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

64786810428 is a wasteful number, since it uses less digits than its factorization.

64786810428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43893554 (or 43893549 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 64786810428 in words is "sixty-four billion, seven hundred eighty-six million, eight hundred ten thousand, four hundred twenty-eight".