210857123196 has 36 divisors (see below), whose sum is σ = 564352890192. Its totient is φ = 66151254144.

The previous prime is 210857123177. The next prime is 210857123209. The reversal of 210857123196 is 691321758012.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172268280 + ... + 172269503.

It is an arithmetic number, because the mean of its divisors is an integer number (15676469172).

Almost surely, 2^210857123196 is an apocalyptic number.

It is an amenable number.

210857123196 is an abundant number, since it is smaller than the sum of its proper divisors (353495766996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210857123196 is a wasteful number, since it uses less digits than its factorization.

210857123196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344537810 (or 344537805 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 210857123196 in words is "two hundred ten billion, eight hundred fifty-seven million, one hundred twenty-three thousand, one hundred ninety-six".