65816261636 has 6 divisors (see below), whose sum is σ = 115178457870. Its totient is φ = 32908130816.

The previous prime is 65816261633. The next prime is 65816261647. The reversal of 65816261636 is 63616261856.

It can be written as a sum of positive squares in only one way, i.e., 54844956100 + 10971305536 = 234190^2 + 104744^2 .

It is not an unprimeable number, because it can be changed into a prime (65816261633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8227032701 + ... + 8227032708.

It is an arithmetic number, because the mean of its divisors is an integer number (19196409645).

Almost surely, 2^65816261636 is an apocalyptic number.

It is an amenable number.

65816261636 is a deficient number, since it is larger than the sum of its proper divisors (49362196234).

65816261636 is a wasteful number, since it uses less digits than its factorization.

65816261636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16454065413 (or 16454065411 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The spelling of 65816261636 in words is "sixty-five billion, eight hundred sixteen million, two hundred sixty-one thousand, six hundred thirty-six".