214691864440 has 64 divisors (see below), whose sum is σ = 493790450400. Its totient is φ = 83983613952.

The previous prime is 214691864369. The next prime is 214691864441. The reversal of 214691864440 is 44468196412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214691864441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219804 + ... + 691156.

Almost surely, 2^214691864440 is an apocalyptic number.

214691864440 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 214691864440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246895225200).

214691864440 is an abundant number, since it is smaller than the sum of its proper divisors (279098585960).

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

214691864440 is a wasteful number, since it uses less digits than its factorization.

214691864440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471616 (or 471612 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 214691864440 in words is "two hundred fourteen billion, six hundred ninety-one million, eight hundred sixty-four thousand, four hundred forty".