53216236665 has 12 divisors (see below), whose sum is σ = 92241476964. Its totient is φ = 28381992864.

The previous prime is 53216236649. The next prime is 53216236669. The reversal of 53216236665 is 56663261235.

It can be written as a sum of positive squares in 2 ways, for example, as 26173091961 + 27043144704 = 161781^2 + 164448^2 .

It is not a de Polignac number, because 53216236665 - 2⁴ = 53216236649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1182583037 = 53216236665 / (5 + 3 + 2 + 1 + 6 + 2 + 3 + 6 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 53216236665.

It is not an unprimeable number, because it can be changed into a prime (53216236669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 591291474 + ... + 591291563.

It is an arithmetic number, because the mean of its divisors is an integer number (7686789747).

Almost surely, 2^53216236665 is an apocalyptic number.

It is an amenable number.

53216236665 is a deficient number, since it is larger than the sum of its proper divisors (39025240299).

53216236665 is a wasteful number, since it uses less digits than its factorization.

53216236665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182583048 (or 1182583045 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The spelling of 53216236665 in words is "fifty-three billion, two hundred sixteen million, two hundred thirty-six thousand, six hundred sixty-five".