64847477088 has 72 divisors (see below), whose sum is σ = 184649210928. Its totient is φ = 21587788032.

The previous prime is 64847477063. The next prime is 64847477089. The reversal of 64847477088 is 88077474846.

64847477088 is a `hidden beast` number, since 6 + 4 + 84 + 7 + 477 + 0 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64847477089) 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 11 ways as a sum of consecutive naturals, for example, 76981 + ... + 368267.

It is an arithmetic number, because the mean of its divisors is an integer number (2564572374).

Almost surely, 2^64847477088 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 64847477088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92324605464).

64847477088 is an abundant number, since it is smaller than the sum of its proper divisors (119801733840).

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

64847477088 is a wasteful number, since it uses less digits than its factorization.

64847477088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292076 (or 292065 counting only the distinct ones).

The product of its (nonzero) digits is 67436544, while the sum is 63.

The spelling of 64847477088 in words is "sixty-four billion, eight hundred forty-seven million, four hundred seventy-seven thousand, eighty-eight".