211986576401 has 4 divisors (see below), whose sum is σ = 213533923812. Its totient is φ = 210439228992.

The previous prime is 211986576377. The next prime is 211986576413. The reversal of 211986576401 is 104675689112.

It is a Cunningham number, because it is equal to 460420²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124521471376 + 87465105025 = 352876^2 + 295745^2 .

It is a cyclic number.

It is not a de Polignac number, because 211986576401 - 2¹⁴ = 211986560017 is a prime.

It is a super-2 number, since 2×211986576401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211986576401.

It is not an unprimeable number, because it can be changed into a prime (211986570401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773673500 + ... + 773673773.

It is an arithmetic number, because the mean of its divisors is an integer number (53383480953).

Almost surely, 2^211986576401 is an apocalyptic number.

It is an amenable number.

211986576401 is a deficient number, since it is larger than the sum of its proper divisors (1547347411).

211986576401 is a wasteful number, since it uses less digits than its factorization.

211986576401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547347410.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 211986576401 in words is "two hundred eleven billion, nine hundred eighty-six million, five hundred seventy-six thousand, four hundred one".