512421161611523 has 4 divisors (see below), whose sum is σ = 522089485415568. Its totient is φ = 502752837807480.

The previous prime is 512421161611501. The next prime is 512421161611531. The reversal of 512421161611523 is 325116161124215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 512421161611523 - 2²⁰ = 512421160562947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512421161611123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4834161901943 + ... + 4834161902048.

It is an arithmetic number, because the mean of its divisors is an integer number (130522371353892).

Almost surely, 2^{512421161611523} is an apocalyptic number.

512421161611523 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

512421161611523 is a deficient number, since it is larger than the sum of its proper divisors (9668323804045).

512421161611523 is an equidigital number, since it uses as much as digits as its factorization.

512421161611523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9668323804044.

The product of its digits is 86400, while the sum is 41.

The spelling of 512421161611523 in words is "five hundred twelve trillion, four hundred twenty-one billion, one hundred sixty-one million, six hundred eleven thousand, five hundred twenty-three".