65915140 has 12 divisors (see below), whose sum is σ = 138421836. Its totient is φ = 26366048.

The previous prime is 65915119. The next prime is 65915147. The reversal of 65915140 is 4151956.

65915140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7300804 + 58614336 = 2702^2 + 7656^2 .

It is not an unprimeable number, because it can be changed into a prime (65915147) 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 3 ways as a sum of consecutive naturals, for example, 1647859 + ... + 1647898.

It is an arithmetic number, because the mean of its divisors is an integer number (11535153).

Almost surely, 2^65915140 is an apocalyptic number.

It is an amenable number.

65915140 is an abundant number, since it is smaller than the sum of its proper divisors (72506696).

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

65915140 is a wasteful number, since it uses less digits than its factorization.

65915140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295766 (or 3295764 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 65915140 is about 8118.8139527889. The cubic root of 65915140 is about 403.9507259449.

The spelling of 65915140 in words is "sixty-five million, nine hundred fifteen thousand, one hundred forty".