216378794344 has 16 divisors (see below), whose sum is σ = 419700248100. Its totient is φ = 104458728192.

The previous prime is 216378794327. The next prime is 216378794347. The reversal of 216378794344 is 443497873612.

It can be written as a sum of positive squares in 2 ways, for example, as 213305422500 + 3073371844 = 461850^2 + 55438^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (216378794347) 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, 466333377 + ... + 466333840.

Almost surely, 2^216378794344 is an apocalyptic number.

It is an amenable number.

216378794344 is a deficient number, since it is larger than the sum of its proper divisors (203321453756).

216378794344 is a wasteful number, since it uses less digits than its factorization.

216378794344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932667252 (or 932667248 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 58.

The spelling of 216378794344 in words is "two hundred sixteen billion, three hundred seventy-eight million, seven hundred ninety-four thousand, three hundred forty-four".