65445120 has 432 divisors, whose sum is σ = 267845760. Its totient is φ = 14598144.

The previous prime is 65445113. The next prime is 65445167. The reversal of 65445120 is 2154456.

65445120 is a `hidden beast` number, since 654 + 4 + 5 + 1 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2845429 + ... + 2845451.

Almost surely, 2^65445120 is an apocalyptic number.

65445120 is a gapful number since it is divisible by the number (60) 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 65445120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133922880).

65445120 is an abundant number, since it is smaller than the sum of its proper divisors (202400640).

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

65445120 is a wasteful number, since it uses less digits than its factorization.

65445120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 65445120 is about 8089.8158199059. The cubic root of 65445120 is about 402.9882864335.

Adding to 65445120 its reverse (2154456), we get a palindrome (67599576).

It can be divided in two parts, 6544 and 5120, that added together give a square (11664 = 108²).

The spelling of 65445120 in words is "sixty-five million, four hundred forty-five thousand, one hundred twenty".