512926936561 has 4 divisors (see below), whose sum is σ = 552382854772. Its totient is φ = 473471018352.

The previous prime is 512926936537. The next prime is 512926936591. The reversal of 512926936561 is 165639629215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165639629215 = 5 ⋅33127925843.

It can be written as a sum of positive squares in 2 ways, for example, as 144186518961 + 368740417600 = 379719^2 + 607240^2 .

It is a cyclic number.

It is not a de Polignac number, because 512926936561 - 2⁷ = 512926936433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512926936591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19727959086 + ... + 19727959111.

It is an arithmetic number, because the mean of its divisors is an integer number (138095713693).

Almost surely, 2^512926936561 is an apocalyptic number.

It is an amenable number.

512926936561 is a deficient number, since it is larger than the sum of its proper divisors (39455918211).

512926936561 is a wasteful number, since it uses less digits than its factorization.

512926936561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39455918210.

The product of its digits is 5248800, while the sum is 55.

The spelling of 512926936561 in words is "five hundred twelve billion, nine hundred twenty-six million, nine hundred thirty-six thousand, five hundred sixty-one".