213443123661688 has 16 divisors (see below), whose sum is σ = 414006058827000. Its totient is φ = 103041507974496.

The previous prime is 213443123661619. The next prime is 213443123661689. The reversal of 213443123661688 is 886166321344312.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213443123661689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460006731798 + ... + 460006732261.

Almost surely, 2^{213443123661688} is an apocalyptic number.

It is an amenable number.

213443123661688 is a deficient number, since it is larger than the sum of its proper divisors (200562935165312).

213443123661688 is a wasteful number, since it uses less digits than its factorization.

213443123661688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920013464094 (or 920013464090 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 58.

The spelling of 213443123661688 in words is "two hundred thirteen trillion, four hundred forty-three billion, one hundred twenty-three million, six hundred sixty-one thousand, six hundred eighty-eight".