64735469568 has 840 divisors, whose sum is σ = 246777915384. Its totient is φ = 16721510400.

The previous prime is 64735469551. The next prime is 64735469573. The reversal of 64735469568 is 86596453746.

64735469568 is a `hidden beast` number, since 6 + 4 + 7 + 3 + 5 + 4 + 69 + 568 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 357654438 + ... + 357654618.

Almost surely, 2^64735469568 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 64735469568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123388957692).

64735469568 is an abundant number, since it is smaller than the sum of its proper divisors (182042445816).

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

64735469568 is a wasteful number, since it uses less digits than its factorization.

64735469568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 204 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 63.

The spelling of 64735469568 in words is "sixty-four billion, seven hundred thirty-five million, four hundred sixty-nine thousand, five hundred sixty-eight".