65840480836 has 81 divisors (see below), whose sum is σ = 127464743133. Its totient is φ = 29744376480.

The previous prime is 65840480831. The next prime is 65840480851. The reversal of 65840480836 is 63808404856.

The square root of 65840480836 is 256594.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9739716100 + 56100764736 = 98690^2 + 236856^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (65840480831) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 473672455 + ... + 473672593.

Almost surely, 2^65840480836 is an apocalyptic number.

65840480836 is the 256594-th square number.

It is an amenable number.

65840480836 is a deficient number, since it is larger than the sum of its proper divisors (61624262297).

65840480836 is a wasteful number, since it uses less digits than its factorization.

65840480836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 52.

The spelling of 65840480836 in words is "sixty-five billion, eight hundred forty million, four hundred eighty thousand, eight hundred thirty-six".