211161006564 has 24 divisors (see below), whose sum is σ = 499648580928. Its totient is φ = 69395635680.

The previous prime is 211161006559. The next prime is 211161006583. The reversal of 211161006564 is 465600161112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123919927 + ... + 123921630.

It is an arithmetic number, because the mean of its divisors is an integer number (20818690872).

Almost surely, 2^211161006564 is an apocalyptic number.

It is an amenable number.

211161006564 is an abundant number, since it is smaller than the sum of its proper divisors (288487574364).

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

211161006564 is a wasteful number, since it uses less digits than its factorization.

211161006564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247841635 (or 247841633 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 211161006564 its reverse (465600161112), we get a palindrome (676761167676).

The spelling of 211161006564 in words is "two hundred eleven billion, one hundred sixty-one million, six thousand, five hundred sixty-four".