211170805904 has 40 divisors (see below), whose sum is σ = 438694421760. Its totient is φ = 98116581888.

The previous prime is 211170805903. The next prime is 211170805933. The reversal of 211170805904 is 409508071112.

It is a super-2 number, since 2×211170805904² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211170805903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4892204 + ... + 4935179.

It is an arithmetic number, because the mean of its divisors is an integer number (10967360544).

Almost surely, 2^211170805904 is an apocalyptic number.

It is an amenable number.

211170805904 is an abundant number, since it is smaller than the sum of its proper divisors (227523615856).

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

211170805904 is a wasteful number, since it uses less digits than its factorization.

211170805904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9827487 (or 9827481 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 211170805904 in words is "two hundred eleven billion, one hundred seventy million, eight hundred five thousand, nine hundred four".