65487136 has 72 divisors (see below), whose sum is σ = 152732412. Its totient is φ = 27456000.

The previous prime is 65487101. The next prime is 65487137. The reversal of 65487136 is 63178456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46512400 + 18974736 = 6820^2 + 4356^2 .

It is not an unprimeable number, because it can be changed into a prime (65487137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49686 + ... + 50986.

Almost surely, 2^65487136 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 65487136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76366206).

65487136 is an abundant number, since it is smaller than the sum of its proper divisors (87245276).

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

65487136 is a wasteful number, since it uses less digits than its factorization.

65487136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1327 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 65487136 is about 8092.4122485202. The cubic root of 65487136 is about 403.0745079560.

The spelling of 65487136 in words is "sixty-five million, four hundred eighty-seven thousand, one hundred thirty-six".