518219253513 has 12 divisors (see below), whose sum is σ = 806118838980. Its totient is φ = 318904155936.

The previous prime is 518219253481. The next prime is 518219253533. The reversal of 518219253513 is 315352912815.

518219253513 is a `hidden beast` number, since 5 + 1 + 8 + 21 + 92 + 535 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161806671504 + 356412582009 = 402252^2 + 597003^2 .

It is not a de Polignac number, because 518219253513 - 2⁵ = 518219253481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (518219253533) 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, 2214612078 + ... + 2214612311.

It is an arithmetic number, because the mean of its divisors is an integer number (67176569915).

Almost surely, 2^518219253513 is an apocalyptic number.

It is an amenable number.

518219253513 is a deficient number, since it is larger than the sum of its proper divisors (287899585467).

518219253513 is a wasteful number, since it uses less digits than its factorization.

518219253513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4429224408 (or 4429224405 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 518219253513 in words is "five hundred eighteen billion, two hundred nineteen million, two hundred fifty-three thousand, five hundred thirteen".