216335436440 has 32 divisors (see below), whose sum is σ = 486886302000. Its totient is φ = 86510784384.

The previous prime is 216335436433. The next prime is 216335436451. The reversal of 216335436440 is 44634533612.

It is a congruent number.

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, 580730 + ... + 877449.

Almost surely, 2^216335436440 is an apocalyptic number.

216335436440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216335436440 is an abundant number, since it is smaller than the sum of its proper divisors (270550865560).

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

216335436440 is a wasteful number, since it uses less digits than its factorization.

216335436440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461899 (or 1461895 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 216335436440 in words is "two hundred sixteen billion, three hundred thirty-five million, four hundred thirty-six thousand, four hundred forty".