213986697805 has 16 divisors (see below), whose sum is σ = 263888622720. Its totient is φ = 166458739392.

The previous prime is 213986697779. The next prime is 213986697817. The reversal of 213986697805 is 508796689312.

213986697805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 213986697805 - 2⁹ = 213986697293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62595 + ... + 657184.

It is an arithmetic number, because the mean of its divisors is an integer number (16493038920).

Almost surely, 2^213986697805 is an apocalyptic number.

It is an amenable number.

213986697805 is a deficient number, since it is larger than the sum of its proper divisors (49901924915).

213986697805 is a wasteful number, since it uses less digits than its factorization.

213986697805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721428.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 213986697805 in words is "two hundred thirteen billion, nine hundred eighty-six million, six hundred ninety-seven thousand, eight hundred five".