511216450447 has 2 divisors, whose sum is σ = 511216450448. Its totient is φ = 511216450446.

The previous prime is 511216450403. The next prime is 511216450483. The reversal of 511216450447 is 744054612115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511216450447 - 2¹¹ = 511216448399 is a prime.

It is a super-2 number, since 2×511216450447² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511216850447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255608225223 + 255608225224.

It is an arithmetic number, because the mean of its divisors is an integer number (255608225224).

Almost surely, 2^511216450447 is an apocalyptic number.

511216450447 is a deficient number, since it is larger than the sum of its proper divisors (1).

511216450447 is an equidigital number, since it uses as much as digits as its factorization.

511216450447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 511216450447 in words is "five hundred eleven billion, two hundred sixteen million, four hundred fifty thousand, four hundred forty-seven".