65045640 has 64 divisors (see below), whose sum is σ = 212880960. Its totient is φ = 15768320.

The previous prime is 65045611. The next prime is 65045663. The reversal of 65045640 is 4654056.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 65045598 and 65045607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23319 + ... + 25958.

It is an arithmetic number, because the mean of its divisors is an integer number (3326265).

Almost surely, 2^65045640 is an apocalyptic number.

65045640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65045640 is an abundant number, since it is smaller than the sum of its proper divisors (147835320).

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

65045640 is a wasteful number, since it uses less digits than its factorization.

65045640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49302 (or 49298 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 65045640 is about 8065.0877242594. The cubic root of 65045640 is about 402.1666594438.

Adding to 65045640 its reverse (4654056), we get a palindrome (69699696).

The spelling of 65045640 in words is "sixty-five million, forty-five thousand, six hundred forty".