509155868 has 12 divisors (see below), whose sum is σ = 959563080. Its totient is φ = 234994992.

The previous prime is 509155799. The next prime is 509155877. The reversal of 509155868 is 868551905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4895678 + ... + 4895781.

It is an arithmetic number, because the mean of its divisors is an integer number (79963590).

Almost surely, 2^509155868 is an apocalyptic number.

It is an amenable number.

509155868 is a deficient number, since it is larger than the sum of its proper divisors (450407212).

509155868 is a wasteful number, since it uses less digits than its factorization.

509155868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791476 (or 9791474 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 47.

The square root of 509155868 is about 22564.4824447626. The cubic root of 509155868 is about 798.5159298722.

The spelling of 509155868 in words is "five hundred nine million, one hundred fifty-five thousand, eight hundred sixty-eight".