64002544521016 has 32 divisors (see below), whose sum is σ = 123249255822000. Its totient is φ = 31136091918336.

The previous prime is 64002544521011. The next prime is 64002544521049. The reversal of 64002544521016 is 61012544520046.

It is a self number, because there is not a number n which added to its sum of digits gives 64002544521016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64002544521011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33978075 + ... + 35812213.

Almost surely, 2^{64002544521016} is an apocalyptic number.

It is an amenable number.

64002544521016 is a deficient number, since it is larger than the sum of its proper divisors (59246711300984).

64002544521016 is a wasteful number, since it uses less digits than its factorization.

64002544521016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952071 (or 1952067 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 64002544521016 in words is "sixty-four trillion, two billion, five hundred forty-four million, five hundred twenty-one thousand, sixteen".