64387287504 has 100 divisors (see below), whose sum is σ = 186447731140. Its totient is φ = 21451806720.

The previous prime is 64387287499. The next prime is 64387287521. The reversal of 64387287504 is 40578278346.

64387287504 is a `hidden beast` number, since 64 + 3 + 8 + 72 + 8 + 7 + 504 = 666.

64387287504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36748890000 + 27638397504 = 191700^2 + 166248^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2867232 + ... + 2889600.

Almost surely, 2^64387287504 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 64387287504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93223865570).

64387287504 is an abundant number, since it is smaller than the sum of its proper divisors (122060443636).

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

64387287504 is a wasteful number, since it uses less digits than its factorization.

64387287504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24610 (or 24595 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 64387287504 in words is "sixty-four billion, three hundred eighty-seven million, two hundred eighty-seven thousand, five hundred four".