52215661669 has 2 divisors, whose sum is σ = 52215661670. Its totient is φ = 52215661668.

The previous prime is 52215661651. The next prime is 52215661679. The reversal of 52215661669 is 96616651225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42431880100 + 9783781569 = 205990^2 + 98913^2 .

It is a cyclic number.

It is not a de Polignac number, because 52215661669 - 2¹¹ = 52215659621 is a prime.

It is a super-2 number, since 2×52215661669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52215661679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26107830834 + 26107830835.

It is an arithmetic number, because the mean of its divisors is an integer number (26107830835).

Almost surely, 2^52215661669 is an apocalyptic number.

It is an amenable number.

52215661669 is a deficient number, since it is larger than the sum of its proper divisors (1).

52215661669 is an equidigital number, since it uses as much as digits as its factorization.

52215661669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 49.

The spelling of 52215661669 in words is "fifty-two billion, two hundred fifteen million, six hundred sixty-one thousand, six hundred sixty-nine".