64473409690568 has 16 divisors (see below), whose sum is σ = 120888479207580. Its totient is φ = 32236481901888.

The previous prime is 64473409690561. The next prime is 64473409690589. The reversal of 64473409690568 is 86509690437446.

It can be written as a sum of positive squares in 2 ways, for example, as 59549280045124 + 4924129645444 = 7716818^2 + 2219038^2 .

It is not an unprimeable number, because it can be changed into a prime (64473409690561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26635655 + ... + 28955222.

Almost surely, 2^{64473409690568} is an apocalyptic number.

It is an amenable number.

64473409690568 is a deficient number, since it is larger than the sum of its proper divisors (56415069517012).

64473409690568 is a wasteful number, since it uses less digits than its factorization.

64473409690568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55735856 (or 55735852 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 71.

The spelling of 64473409690568 in words is "sixty-four trillion, four hundred seventy-three billion, four hundred nine million, six hundred ninety thousand, five hundred sixty-eight".