512861100561 has 12 divisors (see below), whose sum is σ = 784375801092. Its totient is φ = 321795200256.

The previous prime is 512861100551. The next prime is 512861100683. The reversal of 512861100561 is 165001168215.

512861100561 is a `hidden beast` number, since 5 + 1 + 2 + 86 + 1 + 10 + 0 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 371612160000 + 141248940561 = 609600^2 + 375831^2 .

It is not a de Polignac number, because 512861100561 - 2⁹ = 512861100049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (512861100551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1676016516 + ... + 1676016821.

It is an arithmetic number, because the mean of its divisors is an integer number (65364650091).

Almost surely, 2^512861100561 is an apocalyptic number.

512861100561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

512861100561 is a deficient number, since it is larger than the sum of its proper divisors (271514700531).

512861100561 is a wasteful number, since it uses less digits than its factorization.

512861100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352033360 (or 3352033357 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

Adding to 512861100561 its reverse (165001168215), we get a palindrome (677862268776).

The spelling of 512861100561 in words is "five hundred twelve billion, eight hundred sixty-one million, one hundred thousand, five hundred sixty-one".