513440453465 has 4 divisors (see below), whose sum is σ = 616128544164. Its totient is φ = 410752362768.

The previous prime is 513440453443. The next prime is 513440453473. The reversal of 513440453465 is 564354044315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 175882939456 + 337557514009 = 419384^2 + 580997^2 .

It is a cyclic number.

It is not a de Polignac number, because 513440453465 - 2¹² = 513440449369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51344045342 + ... + 51344045351.

It is an arithmetic number, because the mean of its divisors is an integer number (154032136041).

Almost surely, 2^513440453465 is an apocalyptic number.

It is an amenable number.

513440453465 is a deficient number, since it is larger than the sum of its proper divisors (102688090699).

513440453465 is a wasteful number, since it uses less digits than its factorization.

513440453465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102688090698.

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 513440453465 in words is "five hundred thirteen billion, four hundred forty million, four hundred fifty-three thousand, four hundred sixty-five".