511260649 has 6 divisors (see below), whose sum is σ = 528285930. Its totient is φ = 494767440.

The previous prime is 511260599. The next prime is 511260653. The reversal of 511260649 is 946062115.

It can be written as a sum of positive squares in only one way, i.e., 509314624 + 1946025 = 22568^2 + 1395^2 .

It is not a de Polignac number, because 511260649 - 2⁷ = 511260521 is a prime.

It is a super-2 number, since 2×511260649² = 522774902431802402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511260679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 265044 + ... + 266965.

It is an arithmetic number, because the mean of its divisors is an integer number (88047655).

Almost surely, 2^511260649 is an apocalyptic number.

It is an amenable number.

511260649 is a deficient number, since it is larger than the sum of its proper divisors (17025281).

511260649 is an equidigital number, since it uses as much as digits as its factorization.

511260649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532071 (or 532040 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 511260649 is about 22611.0735923795. The cubic root of 511260649 is about 799.6147358484.

The spelling of 511260649 in words is "five hundred eleven million, two hundred sixty thousand, six hundred forty-nine".