512115252561 has 24 divisors (see below), whose sum is σ = 810184546080. Its totient is φ = 309136320000.

The previous prime is 512115252559. The next prime is 512115252637. The reversal of 512115252561 is 165252511215.

512115252561 is a `hidden beast` number, since 5 + 1 + 21 + 1 + 52 + 525 + 61 = 666.

It is not a de Polignac number, because 512115252561 - 2¹ = 512115252559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (512115250561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10279696 + ... + 10329393.

It is an arithmetic number, because the mean of its divisors is an integer number (33757689420).

Almost surely, 2^512115252561 is an apocalyptic number.

It is an amenable number.

512115252561 is a deficient number, since it is larger than the sum of its proper divisors (298069293519).

512115252561 is a wasteful number, since it uses less digits than its factorization.

512115252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20609357 (or 20609354 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

Adding to 512115252561 its reverse (165252511215), we get a palindrome (677367763776).

The spelling of 512115252561 in words is "five hundred twelve billion, one hundred fifteen million, two hundred fifty-two thousand, five hundred sixty-one".