5012661016565 has 12 divisors (see below), whose sum is σ = 6068896173444. Its totient is φ = 3974640897024.

The previous prime is 5012661016537. The next prime is 5012661016579. The reversal of 5012661016565 is 5656101662105.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1283614223089 + 3729046793476 = 1132967^2 + 1931074^2 .

It is not a de Polignac number, because 5012661016565 - 2¹⁴ = 5012661000181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39192644 + ... + 39320333.

It is an arithmetic number, because the mean of its divisors is an integer number (505741347787).

Almost surely, 2^{5012661016565} is an apocalyptic number.

It is an amenable number.

5012661016565 is a deficient number, since it is larger than the sum of its proper divisors (1056235156879).

5012661016565 is an equidigital number, since it uses as much as digits as its factorization.

5012661016565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78513208 (or 78513095 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 5012661016565 in words is "five trillion, twelve billion, six hundred sixty-one million, sixteen thousand, five hundred sixty-five".