511160166621 has 20 divisors (see below), whose sum is σ = 822322245052. Its totient is φ = 314560101888.

The previous prime is 511160166619. The next prime is 511160166641. The reversal of 511160166621 is 126661061115.

It can be written as a sum of positive squares in 2 ways, for example, as 83593265625 + 427566900996 = 289125^2 + 653886^2 .

It is not a de Polignac number, because 511160166621 - 2¹ = 511160166619 is a prime.

It is a super-2 number, since 2×511160166621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511160166641) 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 19 ways as a sum of consecutive naturals, for example, 242715076 + ... + 242717181.

Almost surely, 2^511160166621 is an apocalyptic number.

It is an amenable number.

511160166621 is a deficient number, since it is larger than the sum of its proper divisors (311162078431).

511160166621 is a wasteful number, since it uses less digits than its factorization.

511160166621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485432282 (or 485432273 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 511160166621 in words is "five hundred eleven billion, one hundred sixty million, one hundred sixty-six thousand, six hundred twenty-one".