64064540736 has 280 divisors, whose sum is σ = 217877014080. Its totient is φ = 18233330688.

The previous prime is 64064540723. The next prime is 64064540767. The reversal of 64064540736 is 63704546046.

It is a happy number.

64064540736 is a `hidden beast` number, since 6 + 40 + 64 + 540 + 7 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64064540691 and 64064540700.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9758191 + ... + 9764753.

Almost surely, 2^64064540736 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 64064540736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108938507040).

64064540736 is an abundant number, since it is smaller than the sum of its proper divisors (153812473344).

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

64064540736 is a wasteful number, since it uses less digits than its factorization.

64064540736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863 (or 6844 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 64064540736 in words is "sixty-four billion, sixty-four million, five hundred forty thousand, seven hundred thirty-six".