64520689575 has 12 divisors (see below), whose sum is σ = 106674206888. Its totient is φ = 34411034400.

The previous prime is 64520689567. The next prime is 64520689613. The reversal of 64520689575 is 57598602546.

It is not a de Polignac number, because 64520689575 - 2³ = 64520689567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430137856 + ... + 430138005.

Almost surely, 2^64520689575 is an apocalyptic number.

64520689575 is a deficient number, since it is larger than the sum of its proper divisors (42153517313).

64520689575 is a wasteful number, since it uses less digits than its factorization.

64520689575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860275874 (or 860275869 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 57.

The spelling of 64520689575 in words is "sixty-four billion, five hundred twenty million, six hundred eighty-nine thousand, five hundred seventy-five".