513521989619 has 4 divisors (see below), whose sum is σ = 520556537496. Its totient is φ = 506487441744.

The previous prime is 513521989597. The next prime is 513521989691. The reversal of 513521989619 is 916989125315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513521989619 - 2⁸ = 513521989363 is a prime.

It is a super-2 number, since 2×513521989619² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513521989699) 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, 3517273829 + ... + 3517273974.

It is an arithmetic number, because the mean of its divisors is an integer number (130139134374).

Almost surely, 2^513521989619 is an apocalyptic number.

513521989619 is a deficient number, since it is larger than the sum of its proper divisors (7034547877).

513521989619 is an equidigital number, since it uses as much as digits as its factorization.

513521989619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034547876.

The product of its digits is 5248800, while the sum is 59.

The spelling of 513521989619 in words is "five hundred thirteen billion, five hundred twenty-one million, nine hundred eighty-nine thousand, six hundred nineteen".