64512033021544 has 8 divisors (see below), whose sum is σ = 120960061915410. Its totient is φ = 32256016510768.

The previous prime is 64512033021521. The next prime is 64512033021563. The reversal of 64512033021544 is 44512033021546.

It can be written as a sum of positive squares in only one way, i.e., 44000536224100 + 20511496797444 = 6633290^2 + 4528962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 64512033021497 and 64512033021506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4032002063839 + ... + 4032002063854.

Almost surely, 2^{64512033021544} is an apocalyptic number.

It is an amenable number.

64512033021544 is a deficient number, since it is larger than the sum of its proper divisors (56448028893866).

64512033021544 is a wasteful number, since it uses less digits than its factorization.

64512033021544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8064004127699 (or 8064004127695 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 64512033021544 in words is "sixty-four trillion, five hundred twelve billion, thirty-three million, twenty-one thousand, five hundred forty-four".