511105556009 has 2 divisors, whose sum is σ = 511105556010. Its totient is φ = 511105556008.

The previous prime is 511105555991. The next prime is 511105556023. The reversal of 511105556009 is 900655501115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439034784409 + 72070771600 = 662597^2 + 268460^2 .

It is a cyclic number.

It is not a de Polignac number, because 511105556009 - 2²⁴ = 511088778793 is a prime.

It is a super-2 number, since 2×511105556009² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (511105556509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255552778004 + 255552778005.

It is an arithmetic number, because the mean of its divisors is an integer number (255552778005).

Almost surely, 2^511105556009 is an apocalyptic number.

It is an amenable number.

511105556009 is a deficient number, since it is larger than the sum of its proper divisors (1).

511105556009 is an equidigital number, since it uses as much as digits as its factorization.

511105556009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33750, while the sum is 38.

The spelling of 511105556009 in words is "five hundred eleven billion, one hundred five million, five hundred fifty-six thousand, nine".