512126666551665 has 48 divisors (see below), whose sum is σ = 968386918150080. Its totient is φ = 248303338669440.

The previous prime is 512126666551649. The next prime is 512126666551693. The reversal of 512126666551665 is 566155666621215.

It is not a de Polignac number, because 512126666551665 - 2⁴ = 512126666551649 is a prime.

It is a super-2 number, since 2×512126666551665² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 405080259 + ... + 406342551.

It is an arithmetic number, because the mean of its divisors is an integer number (20174727461460).

Almost surely, 2^{512126666551665} is an apocalyptic number.

512126666551665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

512126666551665 is a deficient number, since it is larger than the sum of its proper divisors (456260251598415).

512126666551665 is a wasteful number, since it uses less digits than its factorization.

512126666551665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081934 (or 2081931 counting only the distinct ones).

The product of its digits is 116640000, while the sum is 63.

The spelling of 512126666551665 in words is "five hundred twelve trillion, one hundred twenty-six billion, six hundred sixty-six million, five hundred fifty-one thousand, six hundred sixty-five".