64725785208 has 288 divisors, whose sum is σ = 216642731760. Its totient is φ = 18040942080.

The previous prime is 64725785197. The next prime is 64725785221. The reversal of 64725785208 is 80258752746.

64725785208 is a `hidden beast` number, since 6 + 47 + 2 + 5 + 78 + 520 + 8 = 666.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3897210 + ... + 3913782.

Almost surely, 2^64725785208 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 64725785208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108321365880).

64725785208 is an abundant number, since it is smaller than the sum of its proper divisors (151916946552).

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

64725785208 is a wasteful number, since it uses less digits than its factorization.

64725785208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16649 (or 16626 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 64725785208 in words is "sixty-four billion, seven hundred twenty-five million, seven hundred eighty-five thousand, two hundred eight".