65641512 has 64 divisors (see below), whose sum is σ = 168537600. Its totient is φ = 21297600.

The previous prime is 65641489. The next prime is 65641531. The reversal of 65641512 is 21514656.

65641512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65641512² = 8617616195292288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65641512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213663 + ... + 213969.

It is an arithmetic number, because the mean of its divisors is an integer number (2633400).

Almost surely, 2^65641512 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 65641512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84268800).

65641512 is an abundant number, since it is smaller than the sum of its proper divisors (102896088).

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

65641512 is a wasteful number, since it uses less digits than its factorization.

65641512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 522 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 65641512 is about 8101.9449516767. The cubic root of 65641512 is about 403.3909884264.

The spelling of 65641512 in words is "sixty-five million, six hundred forty-one thousand, five hundred twelve".