64521366036 has 24 divisors (see below), whose sum is σ = 150759262080. Its totient is φ = 21477206592.

The previous prime is 64521366031. The next prime is 64521366037. The reversal of 64521366036 is 63066312546.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64521366031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3730441 + ... + 3747696.

It is an arithmetic number, because the mean of its divisors is an integer number (6281635920).

Almost surely, 2^64521366036 is an apocalyptic number.

It is an amenable number.

64521366036 is an abundant number, since it is smaller than the sum of its proper divisors (86237896044).

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

64521366036 is a wasteful number, since it uses less digits than its factorization.

64521366036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7478863 (or 7478861 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 64521366036 in words is "sixty-four billion, five hundred twenty-one million, three hundred sixty-six thousand, thirty-six".