513310405051661 has 8 divisors (see below), whose sum is σ = 586640678183040. Its totient is φ = 439980185737008.

The previous prime is 513310405051651. The next prime is 513310405051693. The reversal of 513310405051661 is 166150504013315.

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

It is not a de Polignac number, because 513310405051661 - 2¹⁴ = 513310405035277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513310405051651) 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 7 ways as a sum of consecutive naturals, for example, 9623675 + ... + 33454983.

It is an arithmetic number, because the mean of its divisors is an integer number (73330084772880).

Almost surely, 2^{513310405051661} is an apocalyptic number.

It is an amenable number.

513310405051661 is a deficient number, since it is larger than the sum of its proper divisors (73330273131379).

513310405051661 is a wasteful number, since it uses less digits than its factorization.

513310405051661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26908363.

The product of its (nonzero) digits is 162000, while the sum is 41.

Adding to 513310405051661 its reverse (166150504013315), we get a palindrome (679460909064976).

The spelling of 513310405051661 in words is "five hundred thirteen trillion, three hundred ten billion, four hundred five million, fifty-one thousand, six hundred sixty-one".