213816543046465 has 8 divisors (see below), whose sum is σ = 256774083194088. Its totient is φ = 170923746744960.

The previous prime is 213816543046453. The next prime is 213816543046501. The reversal of 213816543046465 is 564640345618312.

It can be written as a sum of positive squares in 4 ways, for example, as 61105301392144 + 152711241654321 = 7816988^2 + 12357639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213816543046465 - 2⁹ = 213816543045953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16185954262 + ... + 16185967471.

It is an arithmetic number, because the mean of its divisors is an integer number (32096760399261).

Almost surely, 2^{213816543046465} is an apocalyptic number.

It is an amenable number.

213816543046465 is a deficient number, since it is larger than the sum of its proper divisors (42957540147623).

213816543046465 is a wasteful number, since it uses less digits than its factorization.

213816543046465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32371923059.

The product of its (nonzero) digits is 49766400, while the sum is 58.

The spelling of 213816543046465 in words is "two hundred thirteen trillion, eight hundred sixteen billion, five hundred forty-three million, forty-six thousand, four hundred sixty-five".