52636336431661 has 4 divisors (see below), whose sum is σ = 52636982096412. Its totient is φ = 52635690766912.

The previous prime is 52636336431589. The next prime is 52636336431677. The reversal of 52636336431661 is 16613463363625.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30647683521225 + 21988652910436 = 5536035^2 + 4689206^2 .

It is a cyclic number.

It is not a de Polignac number, because 52636336431661 - 2⁷ = 52636336431533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52636336431061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322710076 + ... + 322873141.

It is an arithmetic number, because the mean of its divisors is an integer number (13159245524103).

Almost surely, 2^{52636336431661} is an apocalyptic number.

It is an amenable number.

52636336431661 is a deficient number, since it is larger than the sum of its proper divisors (645664751).

52636336431661 is an equidigital number, since it uses as much as digits as its factorization.

52636336431661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645664750.

The product of its digits is 25194240, while the sum is 55.

The spelling of 52636336431661 in words is "fifty-two trillion, six hundred thirty-six billion, three hundred thirty-six million, four hundred thirty-one thousand, six hundred sixty-one".