64340019664 has 20 divisors (see below), whose sum is σ = 124663511104. Its totient is φ = 32168791008.

The previous prime is 64340019659. The next prime is 64340019673. The reversal of 64340019664 is 46691004346.

It is a self number, because there is not a number n which added to its sum of digits gives 64340019664.

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, 484279 + ... + 602665.

Almost surely, 2^64340019664 is an apocalyptic number.

It is an amenable number.

64340019664 is a deficient number, since it is larger than the sum of its proper divisors (60323491440).

64340019664 is a wasteful number, since it uses less digits than its factorization.

64340019664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152362 (or 152356 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 64340019664 in words is "sixty-four billion, three hundred forty million, nineteen thousand, six hundred sixty-four".