513525615612 has 12 divisors (see below), whose sum is σ = 1198226436456. Its totient is φ = 171175205200.

The previous prime is 513525615599. The next prime is 513525615613. The reversal of 513525615612 is 216516525315.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513525615613) 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, 21396900639 + ... + 21396900662.

It is an arithmetic number, because the mean of its divisors is an integer number (99852203038).

Almost surely, 2^513525615612 is an apocalyptic number.

It is an amenable number.

513525615612 is an abundant number, since it is smaller than the sum of its proper divisors (684700820844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513525615612 is a wasteful number, since it uses less digits than its factorization.

513525615612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42793801308 (or 42793801306 counting only the distinct ones).

The product of its digits is 270000, while the sum is 42.

The spelling of 513525615612 in words is "five hundred thirteen billion, five hundred twenty-five million, six hundred fifteen thousand, six hundred twelve".