212664140612 has 96 divisors (see below), whose sum is σ = 492967883520. Its totient is φ = 77836792320.

The previous prime is 212664140599. The next prime is 212664140621. The reversal of 212664140612 is 216041466212.

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, 8738 + ... + 652230.

It is an arithmetic number, because the mean of its divisors is an integer number (5135082120).

Almost surely, 2^212664140612 is an apocalyptic number.

212664140612 is a gapful number since it is divisible by the number (22) 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 212664140612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246483941760).

212664140612 is an abundant number, since it is smaller than the sum of its proper divisors (280303742908).

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

212664140612 is a wasteful number, since it uses less digits than its factorization.

212664140612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643581 (or 643579 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 212664140612 in words is "two hundred twelve billion, six hundred sixty-four million, one hundred forty thousand, six hundred twelve".