210664263260 has 96 divisors (see below), whose sum is σ = 508675204800. Its totient is φ = 72567971840.

The previous prime is 210664263253. The next prime is 210664263281. The reversal of 210664263260 is 62362466012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26636 + ... + 649644.

It is an arithmetic number, because the mean of its divisors is an integer number (5298700050).

Almost surely, 2^210664263260 is an apocalyptic number.

210664263260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210664263260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254337602400).

210664263260 is an abundant number, since it is smaller than the sum of its proper divisors (298010941540).

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

210664263260 is a wasteful number, since it uses less digits than its factorization.

210664263260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623111 (or 623109 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 210664263260 in words is "two hundred ten billion, six hundred sixty-four million, two hundred sixty-three thousand, two hundred sixty".