509225688129 has 4 divisors (see below), whose sum is σ = 678967584176. Its totient is φ = 339483792084.

The previous prime is 509225688121. The next prime is 509225688137. The reversal of 509225688129 is 921886522905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (509225688121) and next prime (509225688137).

It is not a de Polignac number, because 509225688129 - 2³ = 509225688121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509225688121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84870948019 + ... + 84870948024.

It is an arithmetic number, because the mean of its divisors is an integer number (169741896044).

Almost surely, 2^509225688129 is an apocalyptic number.

It is an amenable number.

509225688129 is a deficient number, since it is larger than the sum of its proper divisors (169741896047).

509225688129 is a wasteful number, since it uses less digits than its factorization.

509225688129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169741896046.

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 509225688129 in words is "five hundred nine billion, two hundred twenty-five million, six hundred eighty-eight thousand, one hundred twenty-nine".