520153042074661 has 4 divisors (see below), whose sum is σ = 520160427640300. Its totient is φ = 520145656509024.

The previous prime is 520153042074613. The next prime is 520153042074713. The reversal of 520153042074661 is 166470240351025.

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 219890165745636 + 300262876329025 = 14828694^2 + 17328095^2 .

It is a cyclic number.

It is not a de Polignac number, because 520153042074661 - 2²¹ = 520153039977509 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 (520153042774661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3692677176 + ... + 3692818033.

It is an arithmetic number, because the mean of its divisors is an integer number (130040106910075).

Almost surely, 2^{520153042074661} is an apocalyptic number.

It is an amenable number.

520153042074661 is a deficient number, since it is larger than the sum of its proper divisors (7385565639).

520153042074661 is an equidigital number, since it uses as much as digits as its factorization.

520153042074661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385565638.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 520153042074661 in words is "five hundred twenty trillion, one hundred fifty-three billion, forty-two million, seventy-four thousand, six hundred sixty-one".