216905100944 has 80 divisors (see below), whose sum is σ = 484927795968. Its totient is φ = 92064854016.

The previous prime is 216905100943. The next prime is 216905100953. The reversal of 216905100944 is 449001509612.

It is a super-2 number, since 2×216905100944² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216905100943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6627629 + ... + 6660275.

Almost surely, 2^216905100944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216905100944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242463897984).

216905100944 is an abundant number, since it is smaller than the sum of its proper divisors (268022695024).

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

216905100944 is a wasteful number, since it uses less digits than its factorization.

216905100944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33232 (or 33226 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 216905100944 in words is "two hundred sixteen billion, nine hundred five million, one hundred thousand, nine hundred forty-four".