65455440 has 160 divisors (see below), whose sum is σ = 219200256. Its totient is φ = 16097280.

The previous prime is 65455427. The next prime is 65455441. The reversal of 65455440 is 4455456.

65455440 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-3 number, since 3×65455440³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65455441) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 248749 + ... + 249011.

Almost surely, 2^65455440 is an apocalyptic number.

65455440 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 65455440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109600128).

65455440 is an abundant number, since it is smaller than the sum of its proper divisors (153744816).

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

65455440 is a wasteful number, since it uses less digits than its factorization.

65455440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 65455440 is about 8090.4536337587. The cubic root of 65455440 is about 403.0094676437.

The spelling of 65455440 in words is "sixty-five million, four hundred fifty-five thousand, four hundred forty".