64821942806 has 8 divisors (see below), whose sum is σ = 99494144904. Its totient is φ = 31657227840.

The previous prime is 64821942799. The next prime is 64821942827. The reversal of 64821942806 is 60824912846.

64821942806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376871675 + ... + 376871846.

It is an arithmetic number, because the mean of its divisors is an integer number (12436768113).

Almost surely, 2^64821942806 is an apocalyptic number.

64821942806 is a deficient number, since it is larger than the sum of its proper divisors (34672202098).

64821942806 is a wasteful number, since it uses less digits than its factorization.

64821942806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753743566.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 64821942806 in words is "sixty-four billion, eight hundred twenty-one million, nine hundred forty-two thousand, eight hundred six".