512661663361 has 8 divisors (see below), whose sum is σ = 542826404064. Its totient is φ = 482497830720.

The previous prime is 512661663359. The next prime is 512661663383. The reversal of 512661663361 is 163366166215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 512661663361 - 2¹ = 512661663359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512661669361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187046 + ... + 1560256.

It is an arithmetic number, because the mean of its divisors is an integer number (67853300508).

Almost surely, 2^512661663361 is an apocalyptic number.

It is an amenable number.

512661663361 is a deficient number, since it is larger than the sum of its proper divisors (30164740703).

512661663361 is a wasteful number, since it uses less digits than its factorization.

512661663361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454031.

The product of its digits is 699840, while the sum is 46.

The spelling of 512661663361 in words is "five hundred twelve billion, six hundred sixty-one million, six hundred sixty-three thousand, three hundred sixty-one".