513661030372 has 24 divisors (see below), whose sum is σ = 1031808196160. Its totient is φ = 219179126880.

The previous prime is 513661030297. The next prime is 513661030373. The reversal of 513661030372 is 273030166315.

It is not an unprimeable number, because it can be changed into a prime (513661030373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40048254 + ... + 40061077.

Almost surely, 2^513661030372 is an apocalyptic number.

It is an amenable number.

513661030372 is an abundant number, since it is smaller than the sum of its proper divisors (518147165788).

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

513661030372 is a wasteful number, since it uses less digits than its factorization.

513661030372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80109571 (or 80109569 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 37.

Adding to 513661030372 its reverse (273030166315), we get a palindrome (786691196687).

The spelling of 513661030372 in words is "five hundred thirteen billion, six hundred sixty-one million, thirty thousand, three hundred seventy-two".