504071126661 has 4 divisors (see below), whose sum is σ = 672094835552. Its totient is φ = 336047417772.

The previous prime is 504071126659. The next prime is 504071126731. The reversal of 504071126661 is 166621170405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 504071126661 - 2¹ = 504071126659 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 (504071126621) 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, 84011854441 + ... + 84011854446.

It is an arithmetic number, because the mean of its divisors is an integer number (168023708888).

Almost surely, 2^504071126661 is an apocalyptic number.

It is an amenable number.

504071126661 is a deficient number, since it is larger than the sum of its proper divisors (168023708891).

504071126661 is a wasteful number, since it uses less digits than its factorization.

504071126661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168023708890.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 504071126661 in words is "five hundred four billion, seventy-one million, one hundred twenty-six thousand, six hundred sixty-one".