509054344978 has 8 divisors (see below), whose sum is σ = 808498077372. Its totient is φ = 239554985856.

The previous prime is 509054344963. The next prime is 509054344979. The reversal of 509054344978 is 879443450905.

It can be written as a sum of positive squares in 2 ways, for example, as 508921011769 + 133333209 = 713387^2 + 11547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×509054344978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (509054344979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7486093275 + ... + 7486093342.

Almost surely, 2^509054344978 is an apocalyptic number.

509054344978 is a deficient number, since it is larger than the sum of its proper divisors (299443732394).

509054344978 is a wasteful number, since it uses less digits than its factorization.

509054344978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14972186636.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 509054344978 in words is "five hundred nine billion, fifty-four million, three hundred forty-four thousand, nine hundred seventy-eight".