216649546344 has 128 divisors (see below), whose sum is σ = 750301516800. Its totient is φ = 56272605120.

The previous prime is 216649546343. The next prime is 216649546367. The reversal of 216649546344 is 443645946612.

216649546344 is a `hidden beast` number, since 2 + 1 + 6 + 64 + 9 + 546 + 34 + 4 = 666.

It is a super-2 number, since 2×216649546344² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (216649546343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6496402 + ... + 6529665.

It is an arithmetic number, because the mean of its divisors is an integer number (5861730600).

Almost surely, 2^216649546344 is an apocalyptic number.

216649546344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216649546344 is an abundant number, since it is smaller than the sum of its proper divisors (533651970456).

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

216649546344 is a wasteful number, since it uses less digits than its factorization.

216649546344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13026100 (or 13026090 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 54.

The spelling of 216649546344 in words is "two hundred sixteen billion, six hundred forty-nine million, five hundred forty-six thousand, three hundred forty-four".