64511736 has 96 divisors (see below), whose sum is σ = 175063680. Its totient is φ = 19801600.

The previous prime is 64511731. The next prime is 64511743. The reversal of 64511736 is 63711546.

It is a junction number, because it is equal to n+sod(n) for n = 64511697 and 64511706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64511731) 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, 492391 + ... + 492521.

It is an arithmetic number, because the mean of its divisors is an integer number (1823580).

Almost surely, 2^64511736 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 64511736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87531840).

64511736 is an abundant number, since it is smaller than the sum of its proper divisors (110551944).

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

64511736 is a wasteful number, since it uses less digits than its factorization.

64511736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 224 counting only the distinct ones).

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

The square root of 64511736 is about 8031.9198203169. The cubic root of 64511736 is about 401.0632877103.

The spelling of 64511736 in words is "sixty-four million, five hundred eleven thousand, seven hundred thirty-six".