513663456512 has 18 divisors (see below), whose sum is σ = 1025320415658. Its totient is φ = 256831728128.

The previous prime is 513663456499. The next prime is 513663456547. The reversal of 513663456512 is 215654366315.

It can be written as a sum of positive squares in only one way, i.e., 513595822336 + 67634176 = 716656^2 + 8224^2 .

It is a super-2 number, since 2×513663456512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003248683 + ... + 1003249194.

Almost surely, 2^513663456512 is an apocalyptic number.

It is an amenable number.

513663456512 is a deficient number, since it is larger than the sum of its proper divisors (511656959146).

513663456512 is an equidigital number, since it uses as much as digits as its factorization.

513663456512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006497893 (or 2006497879 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 47.

The spelling of 513663456512 in words is "five hundred thirteen billion, six hundred sixty-three million, four hundred fifty-six thousand, five hundred twelve".