64535944016 has 20 divisors (see below), whose sum is σ = 125189612352. Its totient is φ = 32228947296.

The previous prime is 64535943959. The next prime is 64535944069. The reversal of 64535944016 is 61044953546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2425400 + ... + 2451863.

Almost surely, 2^64535944016 is an apocalyptic number.

It is an amenable number.

64535944016 is a deficient number, since it is larger than the sum of its proper divisors (60653668336).

64535944016 is a wasteful number, since it uses less digits than its factorization.

64535944016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878098 (or 4878092 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 64535944016 in words is "sixty-four billion, five hundred thirty-five million, nine hundred forty-four thousand, sixteen".