505393631385 has 16 divisors (see below), whose sum is σ = 808638668160. Its totient is φ = 269540317440.

The previous prime is 505393631383. The next prime is 505393631411. The reversal of 505393631385 is 583136393505.

It is a happy number.

It is not a de Polignac number, because 505393631385 - 2¹ = 505393631383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505393631383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2380881 + ... + 2584449.

It is an arithmetic number, because the mean of its divisors is an integer number (50539916760).

Almost surely, 2^505393631385 is an apocalyptic number.

It is an amenable number.

505393631385 is a deficient number, since it is larger than the sum of its proper divisors (303245036775).

505393631385 is a wasteful number, since it uses less digits than its factorization.

505393631385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369088.

The product of its (nonzero) digits is 4374000, while the sum is 51.

The spelling of 505393631385 in words is "five hundred five billion, three hundred ninety-three million, six hundred thirty-one thousand, three hundred eighty-five".