64043136 has 192 divisors, whose sum is σ = 200491200. Its totient is φ = 20321280.

The previous prime is 64043113. The next prime is 64043137. The reversal of 64043136 is 63134046.

64043136 is a `hidden beast` number, since 640 + 4 + 3 + 13 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64043137) 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, 901981 + ... + 902051.

It is an arithmetic number, because the mean of its divisors is an integer number (1044225).

Almost surely, 2^64043136 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 64043136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100245600).

64043136 is an abundant number, since it is smaller than the sum of its proper divisors (136448064).

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

64043136 is an equidigital number, since it uses as much as digits as its factorization.

64043136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 64043136 is about 8002.6955458770. The cubic root of 64043136 is about 400.0898464842.

The spelling of 64043136 in words is "sixty-four million, forty-three thousand, one hundred thirty-six".