211889630667556 has 12 divisors (see below), whose sum is σ = 370941741593500. Its totient is φ = 105906275926560.

The previous prime is 211889630667553. The next prime is 211889630667593. The reversal of 211889630667556 is 655766036988112.

It can be written as a sum of positive squares in 2 ways, for example, as 11526568206400 + 200363062461156 = 3395080^2 + 14154966^2 .

It is a hoax number, since the sum of its digits (73) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (211889630667553) 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, 9634839435 + ... + 9634861426.

Almost surely, 2^{211889630667556} is an apocalyptic number.

It is an amenable number.

211889630667556 is a deficient number, since it is larger than the sum of its proper divisors (159052110925944).

211889630667556 is a wasteful number, since it uses less digits than its factorization.

211889630667556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19269703614 (or 19269703612 counting only the distinct ones).

The product of its (nonzero) digits is 783820800, while the sum is 73.

The spelling of 211889630667556 in words is "two hundred eleven trillion, eight hundred eighty-nine billion, six hundred thirty million, six hundred sixty-seven thousand, five hundred fifty-six".