65213864 has 8 divisors (see below), whose sum is σ = 122276010. Its totient is φ = 32606928.

The previous prime is 65213851. The next prime is 65213867. The reversal of 65213864 is 46831256.

65213864 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 only one way, i.e., 44328964 + 20884900 = 6658^2 + 4570^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (65213867) 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 as a sum of consecutive naturals, namely, 4075859 + ... + 4075874.

Almost surely, 2^65213864 is an apocalyptic number.

It is an amenable number.

65213864 is a deficient number, since it is larger than the sum of its proper divisors (57062146).

65213864 is a wasteful number, since it uses less digits than its factorization.

65213864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151739 (or 8151735 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 65213864 is about 8075.5101386847. The cubic root of 65213864 is about 402.5130615722.

The spelling of 65213864 in words is "sixty-five million, two hundred thirteen thousand, eight hundred sixty-four".