513060847821 has 20 divisors (see below), whose sum is σ = 766472067900. Its totient is φ = 342019215936.

The previous prime is 513060847777. The next prime is 513060847829. The reversal of 513060847821 is 128748060315.

513060847821 is a `hidden beast` number, since 5 + 1 + 30 + 608 + 4 + 7 + 8 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 371838965796 + 141221882025 = 609786^2 + 375795^2 .

It is not a de Polignac number, because 513060847821 - 2⁹ = 513060847309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513060847829) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1165735 + ... + 1544363.

It is an arithmetic number, because the mean of its divisors is an integer number (38323603395).

Almost surely, 2^513060847821 is an apocalyptic number.

It is an amenable number.

513060847821 is a deficient number, since it is larger than the sum of its proper divisors (253411220079).

513060847821 is a wasteful number, since it uses less digits than its factorization.

513060847821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395370 (or 395361 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 513060847821 in words is "five hundred thirteen billion, sixty million, eight hundred forty-seven thousand, eight hundred twenty-one".