211530169872 has 80 divisors (see below), whose sum is σ = 693908503680. Its totient is φ = 60437190528.

The previous prime is 211530169871. The next prime is 211530169969. The reversal of 211530169872 is 278961035112.

211530169872 is a `hidden beast` number, since 2 + 11 + 530 + 16 + 98 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (211530169871) 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, 34972203 + ... + 34978250.

It is an arithmetic number, because the mean of its divisors is an integer number (8673856296).

Almost surely, 2^211530169872 is an apocalyptic number.

It is an amenable number.

211530169872 is an abundant number, since it is smaller than the sum of its proper divisors (482378333808).

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

211530169872 is a wasteful number, since it uses less digits than its factorization.

211530169872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69950477 (or 69950465 counting only the distinct ones).

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

The spelling of 211530169872 in words is "two hundred eleven billion, five hundred thirty million, one hundred sixty-nine thousand, eight hundred seventy-two".