216745146528 has 24 divisors (see below), whose sum is σ = 568956009888. Its totient is φ = 72248382144.

The previous prime is 216745146523. The next prime is 216745146557. The reversal of 216745146528 is 825641547612.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (216745146523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128880876 + ... + 1128881067.

It is an arithmetic number, because the mean of its divisors is an integer number (23706500412).

Almost surely, 2^216745146528 is an apocalyptic number.

It is an amenable number.

216745146528 is an abundant number, since it is smaller than the sum of its proper divisors (352210863360).

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

216745146528 is a wasteful number, since it uses less digits than its factorization.

216745146528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257761956 (or 2257761948 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The spelling of 216745146528 in words is "two hundred sixteen billion, seven hundred forty-five million, one hundred forty-six thousand, five hundred twenty-eight".