504173770981 has 4 divisors (see below), whose sum is σ = 504903400864. Its totient is φ = 503444141100.

The previous prime is 504173770901. The next prime is 504173771093. The reversal of 504173770981 is 189077371405.

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 a cyclic number.

It is not a de Polignac number, because 504173770981 - 2⁷ = 504173770853 is a prime.

It is a super-2 number, since 2×504173770981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504173770901) 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, 364813905 + ... + 364815286.

It is an arithmetic number, because the mean of its divisors is an integer number (126225850216).

Almost surely, 2^504173770981 is an apocalyptic number.

It is an amenable number.

504173770981 is a deficient number, since it is larger than the sum of its proper divisors (729629883).

504173770981 is an equidigital number, since it uses as much as digits as its factorization.

504173770981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729629882.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 504173770981 in words is "five hundred four billion, one hundred seventy-three million, seven hundred seventy thousand, nine hundred eighty-one".