509800629801 has 4 divisors (see below), whose sum is σ = 679734173072. Its totient is φ = 339867086532.

The previous prime is 509800629787. The next prime is 509800629809. The reversal of 509800629801 is 108926008905.

It is a happy number.

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 not a de Polignac number, because 509800629801 - 2²⁵ = 509767075369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509800629809) 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, 84966771631 + ... + 84966771636.

It is an arithmetic number, because the mean of its divisors is an integer number (169933543268).

Almost surely, 2^509800629801 is an apocalyptic number.

It is an amenable number.

509800629801 is a deficient number, since it is larger than the sum of its proper divisors (169933543271).

509800629801 is a wasteful number, since it uses less digits than its factorization.

509800629801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169933543270.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 509800629801 in words is "five hundred nine billion, eight hundred million, six hundred twenty-nine thousand, eight hundred one".