211391492656 has 20 divisors (see below), whose sum is σ = 415181581192. Its totient is φ = 104247858816.

The previous prime is 211391492647. The next prime is 211391492671. The reversal of 211391492656 is 656294193112.

211391492656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90491766 + ... + 90494101.

Almost surely, 2^211391492656 is an apocalyptic number.

It is an amenable number.

211391492656 is a deficient number, since it is larger than the sum of its proper divisors (203790088536).

211391492656 is a wasteful number, since it uses less digits than its factorization.

211391492656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180985948 (or 180985942 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The spelling of 211391492656 in words is "two hundred eleven billion, three hundred ninety-one million, four hundred ninety-two thousand, six hundred fifty-six".