64545075427688 has 32 divisors (see below), whose sum is σ = 122297278260960. Its totient is φ = 31933887810240.

The previous prime is 64545075427643. The next prime is 64545075427751. The reversal of 64545075427688 is 88672457054546.

It is a super-2 number, since 2×64545075427688² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88381031 + ... + 89108342.

It is an arithmetic number, because the mean of its divisors is an integer number (3821789945655).

Almost surely, 2^{64545075427688} is an apocalyptic number.

It is an amenable number.

64545075427688 is a deficient number, since it is larger than the sum of its proper divisors (57752202833272).

64545075427688 is a wasteful number, since it uses less digits than its factorization.

64545075427688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177489857 (or 177489853 counting only the distinct ones).

The product of its (nonzero) digits is 1806336000, while the sum is 71.

The spelling of 64545075427688 in words is "sixty-four trillion, five hundred forty-five billion, seventy-five million, four hundred twenty-seven thousand, six hundred eighty-eight".