511004439989 has 2 divisors, whose sum is σ = 511004439990. Its totient is φ = 511004439988.

The previous prime is 511004439941. The next prime is 511004440021. The reversal of 511004439989 is 989934400115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370810359364 + 140194080625 = 608942^2 + 374425^2 .

It is a cyclic number.

It is not a de Polignac number, because 511004439989 - 2²⁰ = 511003391413 is a prime.

It is a super-2 number, since 2×511004439989² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511004439989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511004439389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255502219994 + 255502219995.

It is an arithmetic number, because the mean of its divisors is an integer number (255502219995).

Almost surely, 2^511004439989 is an apocalyptic number.

It is an amenable number.

511004439989 is a deficient number, since it is larger than the sum of its proper divisors (1).

511004439989 is an equidigital number, since it uses as much as digits as its factorization.

511004439989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 511004439989 in words is "five hundred eleven billion, four million, four hundred thirty-nine thousand, nine hundred eighty-nine".