64169688 has 96 divisors (see below), whose sum is σ = 185774400. Its totient is φ = 18406080.

The previous prime is 64169683. The next prime is 64169723. The reversal of 64169688 is 88696146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64169683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54595 + ... + 55757.

It is an arithmetic number, because the mean of its divisors is an integer number (1935150).

Almost surely, 2^64169688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64169688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92887200).

64169688 is an abundant number, since it is smaller than the sum of its proper divisors (121604712).

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

64169688 is a wasteful number, since it uses less digits than its factorization.

64169688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213 (or 1198 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 64169688 is about 8010.5984795145. The cubic root of 64169688 is about 400.3532046910.

The spelling of 64169688 in words is "sixty-four million, one hundred sixty-nine thousand, six hundred eighty-eight".