64537344 has 72 divisors (see below), whose sum is σ = 190868720. Its totient is φ = 21510144.

The previous prime is 64537339. The next prime is 64537349. The reversal of 64537344 is 44373546.

It is a happy number.

64537344 is a `hidden beast` number, since 645 + 3 + 7 + 3 + 4 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (64537339) and next prime (64537349).

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 junction number, because it is equal to n+sod(n) for n = 64537299 and 64537308.

It is not an unprimeable number, because it can be changed into a prime (64537349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244 + ... + 11580.

Almost surely, 2^64537344 is an apocalyptic number.

64537344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64537344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95434360).

64537344 is an abundant number, since it is smaller than the sum of its proper divisors (126331376).

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

64537344 is an equidigital number, since it uses as much as digits as its factorization.

64537344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362 (or 9342 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 64537344 is about 8033.5138015690. The cubic root of 64537344 is about 401.1163481851.

The spelling of 64537344 in words is "sixty-four million, five hundred thirty-seven thousand, three hundred forty-four".