64539000 has 192 divisors, whose sum is σ = 223404480. Its totient is φ = 16800000.

The previous prime is 64538983. The next prime is 64539011. The reversal of 64539000 is 93546.

It is a happy number.

64539000 is nontrivially palindromic in base 14.

It is a zygodrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 638950 + ... + 639050.

It is an arithmetic number, because the mean of its divisors is an integer number (1163565).

Almost surely, 2^64539000 is an apocalyptic number.

64539000 is a gapful number since it is divisible by the number (60) 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 64539000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111702240).

64539000 is an abundant number, since it is smaller than the sum of its proper divisors (158865480).

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

64539000 is a wasteful number, since it uses less digits than its factorization.

64539000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 64539000 is about 8033.6168691319. The cubic root of 64539000 is about 401.1197789791.

The spelling of 64539000 in words is "sixty-four million, five hundred thirty-nine thousand".