216593781432 has 64 divisors (see below), whose sum is σ = 621304992000. Its totient is φ = 61637376000.

The previous prime is 216593781427. The next prime is 216593781497. The reversal of 216593781432 is 234187395612.

It is a congruent number.

It is an unprimeable number.

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, 2526057 + ... + 2610392.

It is an arithmetic number, because the mean of its divisors is an integer number (9707890500).

Almost surely, 2^216593781432 is an apocalyptic number.

It is an amenable number.

216593781432 is an abundant number, since it is smaller than the sum of its proper divisors (404711210568).

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

216593781432 is a wasteful number, since it uses less digits than its factorization.

216593781432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5136716 (or 5136712 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The spelling of 216593781432 in words is "two hundred sixteen billion, five hundred ninety-three million, seven hundred eighty-one thousand, four hundred thirty-two".