16358505813 has 24 divisors (see below), whose sum is σ = 25472269368. Its totient is φ = 10056604032.

The previous prime is 16358505811. The next prime is 16358505817. The reversal of 16358505813 is 31850585361.

16358505813 is a `hidden beast` number, since 1 + 6 + 3 + 585 + 0 + 58 + 13 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7451487684 + 8907018129 = 86322^2 + 94377^2 .

It is not a de Polignac number, because 16358505813 - 2¹ = 16358505811 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16358505811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46531 + ... + 186767.

It is an arithmetic number, because the mean of its divisors is an integer number (1061344557).

Almost surely, 2^16358505813 is an apocalyptic number.

16358505813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16358505813 is a deficient number, since it is larger than the sum of its proper divisors (9113763555).

16358505813 is a wasteful number, since it uses less digits than its factorization.

16358505813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141253 (or 141250 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 16358505813 in words is "sixteen billion, three hundred fifty-eight million, five hundred five thousand, eight hundred thirteen".