64538496 has 144 divisors (see below), whose sum is σ = 204575280. Its totient is φ = 19514880.

The previous prime is 64538491. The next prime is 64538519. The reversal of 64538496 is 69483546.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64538491) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 139161 + ... + 139623.

Almost surely, 2^64538496 is an apocalyptic number.

64538496 is a gapful number since it is divisible by the number (66) 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 64538496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102287640).

64538496 is an abundant number, since it is smaller than the sum of its proper divisors (140036784).

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

64538496 is a wasteful number, since it uses less digits than its factorization.

64538496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 479 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 64538496 is about 8033.5855008832. The cubic root of 64538496 is about 401.1187348306.

The spelling of 64538496 in words is "sixty-four million, five hundred thirty-eight thousand, four hundred ninety-six".