511016106691 has 2 divisors, whose sum is σ = 511016106692. Its totient is φ = 511016106690.

The previous prime is 511016106661. The next prime is 511016106719. The reversal of 511016106691 is 196601610115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511016106691 - 2¹⁹ = 511015582403 is a prime.

It is a super-2 number, since 2×511016106691² (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 511016106691.

It is not a weakly prime, because it can be changed into another prime (511016106611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255508053345 + 255508053346.

It is an arithmetic number, because the mean of its divisors is an integer number (255508053346).

Almost surely, 2^511016106691 is an apocalyptic number.

511016106691 is a deficient number, since it is larger than the sum of its proper divisors (1).

511016106691 is an equidigital number, since it uses as much as digits as its factorization.

511016106691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 37.

The spelling of 511016106691 in words is "five hundred eleven billion, sixteen million, one hundred six thousand, six hundred ninety-one".