64219289664 has 28 divisors (see below), whose sum is σ = 169913537744. Its totient is φ = 21406429824.

The previous prime is 64219289663. The next prime is 64219289741. The reversal of 64219289664 is 46698291246.

It is not an unprimeable number, because it can be changed into a prime (64219289663) 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, 167237542 + ... + 167237925.

Almost surely, 2^64219289664 is an apocalyptic number.

64219289664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64219289664 is an abundant number, since it is smaller than the sum of its proper divisors (105694248080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64219289664 is a wasteful number, since it uses less digits than its factorization.

64219289664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334475482 (or 334475472 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 57.

The spelling of 64219289664 in words is "sixty-four billion, two hundred nineteen million, two hundred eighty-nine thousand, six hundred sixty-four".