509931082961 has 4 divisors (see below), whose sum is σ = 509984550000. Its totient is φ = 509877615924.

The previous prime is 509931082951. The next prime is 509931083041. The reversal of 509931082961 is 169280139905.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-509931082961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509931082951) 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, 26719211 + ... + 26738288.

It is an arithmetic number, because the mean of its divisors is an integer number (127496137500).

Almost surely, 2^509931082961 is an apocalyptic number.

It is an amenable number.

509931082961 is a deficient number, since it is larger than the sum of its proper divisors (53467039).

509931082961 is an equidigital number, since it uses as much as digits as its factorization.

509931082961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53467038.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 509931082961 in words is "five hundred nine billion, nine hundred thirty-one million, eighty-two thousand, nine hundred sixty-one".