64539696 has 80 divisors (see below), whose sum is σ = 180675936. Its totient is φ = 19734528.

The previous prime is 64539691. The next prime is 64539719. The reversal of 64539696 is 69693546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (64539691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182656 + ... + 183008.

Almost surely, 2^64539696 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 64539696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90337968).

64539696 is an abundant number, since it is smaller than the sum of its proper divisors (116136240).

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

64539696 is a wasteful number, since it uses less digits than its factorization.

64539696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 664 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 48.

The square root of 64539696 is about 8033.6601869882. The cubic root of 64539696 is about 401.1212208894.

The spelling of 64539696 in words is "sixty-four million, five hundred thirty-nine thousand, six hundred ninety-six".