211663711476889 has 27 divisors (see below), whose sum is σ = 246793034541717. Its totient is φ = 181005552835128.

The previous prime is 211663711476869. The next prime is 211663711476923. The reversal of 211663711476889 is 988674117366112.

The square root of 211663711476889 is 14548667.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 211663711476889 - 2¹⁷ = 211663711345817 is a prime.

It is a super-2 number, since 2×211663711476889² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211663711476859) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 48781678282 + ... + 48781682620.

Almost surely, 2^{211663711476889} is an apocalyptic number.

211663711476889 is the 14548667-th square number.

211663711476889 is the 7274334-th centered octagonal number.

It is an amenable number.

211663711476889 is a deficient number, since it is larger than the sum of its proper divisors (35129323064828).

211663711476889 is an frugal number, since it uses more digits than its factorization.

211663711476889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650 (or 4825 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 70.

The spelling of 211663711476889 in words is "two hundred eleven trillion, six hundred sixty-three billion, seven hundred eleven million, four hundred seventy-six thousand, eight hundred eighty-nine".