64165536 has 72 divisors (see below), whose sum is σ = 188383104. Its totient is φ = 20695680.

The previous prime is 64165427. The next prime is 64165547. The reversal of 64165536 is 63556146.

64165536 is a `hidden beast` number, since 64 + 1 + 65 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64165536.

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, 5335 + ... + 12521.

It is an arithmetic number, because the mean of its divisors is an integer number (2616432).

Almost surely, 2^64165536 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 64165536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94191552).

64165536 is an abundant number, since it is smaller than the sum of its proper divisors (124217568).

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

64165536 is a wasteful number, since it uses less digits than its factorization.

64165536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7234 (or 7223 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 64165536 is about 8010.3393186556. The cubic root of 64165536 is about 400.3445697606.

It can be divided in two parts, 64 and 165536, that added together give a triangular number (165600 = T₅₇₅).

The spelling of 64165536 in words is "sixty-four million, one hundred sixty-five thousand, five hundred thirty-six".