512961681 has 8 divisors (see below), whose sum is σ = 706011904. Its totient is φ = 330942960.

The previous prime is 512961679. The next prime is 512961697. The reversal of 512961681 is 186169215.

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

It is not a de Polignac number, because 512961681 - 2¹ = 512961679 is a prime.

It is a super-2 number, since 2×512961681² = 526259372348691522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512961611) 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, 2757766 + ... + 2757951.

It is an arithmetic number, because the mean of its divisors is an integer number (88251488).

Almost surely, 2^512961681 is an apocalyptic number.

It is an amenable number.

512961681 is a deficient number, since it is larger than the sum of its proper divisors (193050223).

512961681 is a wasteful number, since it uses less digits than its factorization.

512961681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5515751.

The product of its digits is 25920, while the sum is 39.

The square root of 512961681 is about 22648.6573774253. The cubic root of 512961681 is about 800.5005622523.

It can be divided in two parts, 5 and 12961681, that added together give a triangular number (12961686 = T₅₀₉₁).

The spelling of 512961681 in words is "five hundred twelve million, nine hundred sixty-one thousand, six hundred eighty-one".