509866387622 has 4 divisors (see below), whose sum is σ = 764799581436. Its totient is φ = 254933193810.

The previous prime is 509866387621. The next prime is 509866387763. The reversal of 509866387622 is 226783668905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 226783668905 = 5 ⋅45356733781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509866387621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127466596904 + ... + 127466596907.

It is an arithmetic number, because the mean of its divisors is an integer number (191199895359).

Almost surely, 2^509866387622 is an apocalyptic number.

509866387622 is a deficient number, since it is larger than the sum of its proper divisors (254933193814).

509866387622 is a wasteful number, since it uses less digits than its factorization.

509866387622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254933193813.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 509866387622 in words is "five hundred nine billion, eight hundred sixty-six million, three hundred eighty-seven thousand, six hundred twenty-two".