52166516461 has 4 divisors (see below), whose sum is σ = 52247900124. Its totient is φ = 52085132800.

The previous prime is 52166516447. The next prime is 52166516497. The reversal of 52166516461 is 16461566125.

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 49976838025 + 2189678436 = 223555^2 + 46794^2 .

It is a cyclic number.

It is not a de Polignac number, because 52166516461 - 2¹³ = 52166508269 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 (52166516401) 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, 40690870 + ... + 40692151.

It is an arithmetic number, because the mean of its divisors is an integer number (13061975031).

Almost surely, 2^52166516461 is an apocalyptic number.

It is an amenable number.

52166516461 is a deficient number, since it is larger than the sum of its proper divisors (81383663).

52166516461 is an equidigital number, since it uses as much as digits as its factorization.

52166516461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81383662.

The product of its digits is 259200, while the sum is 43.

The spelling of 52166516461 in words is "fifty-two billion, one hundred sixty-six million, five hundred sixteen thousand, four hundred sixty-one".