211605829489 has 16 divisors (see below), whose sum is σ = 222745564800. Its totient is φ = 200743595136.

The previous prime is 211605829481. The next prime is 211605829543. The reversal of 211605829489 is 984928506112.

It is a cyclic number.

It is not a de Polignac number, because 211605829489 - 2³ = 211605829481 is a prime.

It is a super-2 number, since 2×211605829489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211605829481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366742 + ... + 746800.

It is an arithmetic number, because the mean of its divisors is an integer number (13921597800).

Almost surely, 2^211605829489 is an apocalyptic number.

211605829489 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

211605829489 is a deficient number, since it is larger than the sum of its proper divisors (11139735311).

211605829489 is a wasteful number, since it uses less digits than its factorization.

211605829489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380424.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 211605829489 in words is "two hundred eleven billion, six hundred five million, eight hundred twenty-nine thousand, four hundred eighty-nine".