210949806722 has 18 divisors (see below), whose sum is σ = 320558762979. Its totient is φ = 104114446020.

The previous prime is 210949806719. The next prime is 210949806761. The reversal of 210949806722 is 227608949012.

It can be written as a sum of positive squares in only one way, i.e., 105474903361 + 105474903361 = 324769^2 + 324769^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=324769.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 51311447 + ... + 51315557.

Almost surely, 2^210949806722 is an apocalyptic number.

210949806722 is a deficient number, since it is larger than the sum of its proper divisors (109608956257).

210949806722 is an frugal number, since it uses more digits than its factorization.

210949806722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8382 (or 4192 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

Multiplying 210949806722 by its sum of digits (50), we get a square (10547490336100 = 3247690²).

The spelling of 210949806722 in words is "two hundred ten billion, nine hundred forty-nine million, eight hundred six thousand, seven hundred twenty-two".