65140144 has 40 divisors (see below), whose sum is σ = 130616640. Its totient is φ = 31449600.

The previous prime is 65140139. The next prime is 65140169. The reversal of 65140144 is 44104156.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71049 + ... + 71959.

It is an arithmetic number, because the mean of its divisors is an integer number (3265416).

Almost surely, 2^65140144 is an apocalyptic number.

It is an amenable number.

65140144 is an abundant number, since it is smaller than the sum of its proper divisors (65476496).

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

65140144 is a wasteful number, since it uses less digits than its factorization.

65140144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 65140144 is about 8070.9444304864. The cubic root of 65140144 is about 402.3613328378.

The spelling of 65140144 in words is "sixty-five million, one hundred forty thousand, one hundred forty-four".