64821042804 has 96 divisors (see below), whose sum is σ = 177679224576. Its totient is φ = 18006635520.

The previous prime is 64821042739. The next prime is 64821042829. The reversal of 64821042804 is 40824012846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 976974 + ... + 1041210.

It is an arithmetic number, because the mean of its divisors is an integer number (1850825256).

Almost surely, 2^64821042804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64821042804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88839612288).

64821042804 is an abundant number, since it is smaller than the sum of its proper divisors (112858181772).

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

64821042804 is a wasteful number, since it uses less digits than its factorization.

64821042804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64585 (or 64583 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 39.

The spelling of 64821042804 in words is "sixty-four billion, eight hundred twenty-one million, forty-two thousand, eight hundred four".