516013443661 has 4 divisors (see below), whose sum is σ = 518154578524. Its totient is φ = 513872308800.

The previous prime is 516013443653. The next prime is 516013443761. The reversal of 516013443661 is 166344310615.

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 159836042025 + 356177401636 = 399795^2 + 596806^2 .

It is a cyclic number.

It is not a de Polignac number, because 516013443661 - 2³ = 516013443653 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 (516013443761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070567070 + ... + 1070567551.

It is an arithmetic number, because the mean of its divisors is an integer number (129538644631).

Almost surely, 2^516013443661 is an apocalyptic number.

It is an amenable number.

516013443661 is a deficient number, since it is larger than the sum of its proper divisors (2141134863).

516013443661 is a wasteful number, since it uses less digits than its factorization.

516013443661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141134862.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 516013443661 in words is "five hundred sixteen billion, thirteen million, four hundred forty-three thousand, six hundred sixty-one".