64136448 has 108 divisors (see below), whose sum is σ = 191956128. Its totient is φ = 21358080.

The previous prime is 64136441. The next prime is 64136453. The reversal of 64136448 is 84463146.

64136448 is a `hidden beast` number, since 6 + 4 + 1 + 3 + 644 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is a super-2 number, since 2×64136448² = 8226967924113408, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64136441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61693 + ... + 62723.

Almost surely, 2^64136448 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 64136448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95978064).

64136448 is an abundant number, since it is smaller than the sum of its proper divisors (127819680).

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

64136448 is an equidigital number, since it uses as much as digits as its factorization.

64136448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1036 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 64136448 is about 8008.5234594150. The cubic root of 64136448 is about 400.2840648868.

The spelling of 64136448 in words is "sixty-four million, one hundred thirty-six thousand, four hundred forty-eight".