211898455445 has 16 divisors (see below), whose sum is σ = 259154888832. Its totient is φ = 166269554880.

The previous prime is 211898455421. The next prime is 211898455463. The reversal of 211898455445 is 544554898112.

It is a happy number.

It is not a de Polignac number, because 211898455445 - 2¹⁰ = 211898454421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760280 + ... + 1000910.

It is an arithmetic number, because the mean of its divisors is an integer number (16197180552).

Almost surely, 2^211898455445 is an apocalyptic number.

It is an amenable number.

211898455445 is a deficient number, since it is larger than the sum of its proper divisors (47256433387).

211898455445 is a wasteful number, since it uses less digits than its factorization.

211898455445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244012.

The product of its digits is 9216000, while the sum is 56.

The spelling of 211898455445 in words is "two hundred eleven billion, eight hundred ninety-eight million, four hundred fifty-five thousand, four hundred forty-five".