64537116 has 72 divisors (see below), whose sum is σ = 179511696. Its totient is φ = 17982720.

The previous prime is 64537111. The next prime is 64537171. The reversal of 64537116 is 61173546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64537111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22770 + ... + 25446.

It is an arithmetic number, because the mean of its divisors is an integer number (2493218).

Almost surely, 2^64537116 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 64537116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89755848).

64537116 is an abundant number, since it is smaller than the sum of its proper divisors (114974580).

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

64537116 is a wasteful number, since it uses less digits than its factorization.

64537116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739 (or 2730 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 64537116 is about 8033.4996110039. The cubic root of 64537116 is about 401.1158758248.

The spelling of 64537116 in words is "sixty-four million, five hundred thirty-seven thousand, one hundred sixteen".