509278256552 has 32 divisors (see below), whose sum is σ = 1034435274600. Its totient is φ = 235051494912.

The previous prime is 509278256527. The next prime is 509278256587. The reversal of 509278256552 is 255652872905.

It can be written as a sum of positive squares in 4 ways, for example, as 17335935556 + 491942320996 = 131666^2 + 701386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14470313 + ... + 14505464.

Almost surely, 2^509278256552 is an apocalyptic number.

509278256552 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

509278256552 is an abundant number, since it is smaller than the sum of its proper divisors (525157018048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

509278256552 is a wasteful number, since it uses less digits than its factorization.

509278256552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28975822 (or 28975792 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 56.

The spelling of 509278256552 in words is "five hundred nine billion, two hundred seventy-eight million, two hundred fifty-six thousand, five hundred fifty-two".