512394955405 has 4 divisors (see below), whose sum is σ = 614873946492. Its totient is φ = 409915964320.

The previous prime is 512394955381. The next prime is 512394955441. The reversal of 512394955405 is 504559493215.

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 288724603561 + 223670351844 = 537331^2 + 472938^2 .

It is not a de Polignac number, because 512394955405 - 2¹⁹ = 512394431117 is a prime.

It is a Duffinian number.

It is a congruent 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, 51239495536 + ... + 51239495545.

It is an arithmetic number, because the mean of its divisors is an integer number (153718486623).

Almost surely, 2^512394955405 is an apocalyptic number.

It is an amenable number.

512394955405 is a deficient number, since it is larger than the sum of its proper divisors (102478991087).

512394955405 is a wasteful number, since it uses less digits than its factorization.

512394955405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102478991086.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 512394955405 in words is "five hundred twelve billion, three hundred ninety-four million, nine hundred fifty-five thousand, four hundred five".