511505849 has 2 divisors, whose sum is σ = 511505850. Its totient is φ = 511505848.

The previous prime is 511505779. The next prime is 511505851. The reversal of 511505849 is 948505115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495863824 + 15642025 = 22268^2 + 3955^2 .

It is a cyclic number.

It is not a de Polignac number, because 511505849 - 2¹⁶ = 511440313 is a prime.

It is a super-2 number, since 2×511505849² = 523276467122421602, which contains 22 as substring.

Together with 511505851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (511505879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255752924 + 255752925.

It is an arithmetic number, because the mean of its divisors is an integer number (255752925).

Almost surely, 2^511505849 is an apocalyptic number.

It is an amenable number.

511505849 is a deficient number, since it is larger than the sum of its proper divisors (1).

511505849 is an equidigital number, since it uses as much as digits as its factorization.

511505849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 511505849 is about 22616.4950644436. The cubic root of 511505849 is about 799.7425468437.

The spelling of 511505849 in words is "five hundred eleven million, five hundred five thousand, eight hundred forty-nine".