64637540352 has 1536 divisors, whose sum is σ = 271724544000. Its totient is φ = 14651228160.

The previous prime is 64637540321. The next prime is 64637540353. The reversal of 64637540352 is 25304573646.

64637540352 is a `hidden beast` number, since 6 + 4 + 637 + 5 + 4 + 0 + 3 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (1536).

It is a junction number, because it is equal to n+sod(n) for n = 64637540298 and 64637540307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64637540353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1375266793 + ... + 1375266839.

It is an arithmetic number, because the mean of its divisors is an integer number (176904000).

Almost surely, 2^64637540352 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 64637540352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135862272000).

64637540352 is an abundant number, since it is smaller than the sum of its proper divisors (207087003648).

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

64637540352 is a wasteful number, since it uses less digits than its factorization.

64637540352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 45.

The spelling of 64637540352 in words is "sixty-four billion, six hundred thirty-seven million, five hundred forty thousand, three hundred fifty-two".