509452979863 has 4 divisors (see below), whose sum is σ = 515901751840. Its totient is φ = 503004207888.

The previous prime is 509452979767. The next prime is 509452979869. The reversal of 509452979863 is 368979254905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368979254905 = 5 ⋅73795850981.

It is not a de Polignac number, because 509452979863 - 2¹⁷ = 509452848791 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 (509452979869) 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 3 ways as a sum of consecutive naturals, for example, 3224385870 + ... + 3224386027.

It is an arithmetic number, because the mean of its divisors is an integer number (128975437960).

Almost surely, 2^509452979863 is an apocalyptic number.

509452979863 is a deficient number, since it is larger than the sum of its proper divisors (6448771977).

509452979863 is an equidigital number, since it uses as much as digits as its factorization.

509452979863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448771976.

The product of its (nonzero) digits is 146966400, while the sum is 67.

The spelling of 509452979863 in words is "five hundred nine billion, four hundred fifty-two million, nine hundred seventy-nine thousand, eight hundred sixty-three".