52420542661 has 8 divisors (see below), whose sum is σ = 56857863384. Its totient is φ = 48133639680.

The previous prime is 52420542599. The next prime is 52420542683. The reversal of 52420542661 is 16624502425.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 399600100 + 52020942561 = 19990^2 + 228081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52420542661 - 2¹³ = 52420534469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52420542661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52420542061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37603710 + ... + 37605103.

It is an arithmetic number, because the mean of its divisors is an integer number (7107232923).

Almost surely, 2^52420542661 is an apocalyptic number.

It is an amenable number.

52420542661 is a deficient number, since it is larger than the sum of its proper divisors (4437320723).

52420542661 is a wasteful number, since it uses less digits than its factorization.

52420542661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75208871.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 52420542661 in words is "fifty-two billion, four hundred twenty million, five hundred forty-two thousand, six hundred sixty-one".