219638199816 has 96 divisors (see below), whose sum is σ = 695642650560. Its totient is φ = 61294375296.

The previous prime is 219638199811. The next prime is 219638199857. The reversal of 219638199816 is 618991836912.

219638199816 is a `hidden beast` number, since 2 + 1 + 96 + 381 + 99 + 81 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (219638199811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5045655 + ... + 5088998.

It is an arithmetic number, because the mean of its divisors is an integer number (7246277610).

Almost surely, 2^219638199816 is an apocalyptic number.

It is an amenable number.

219638199816 is an abundant number, since it is smaller than the sum of its proper divisors (476004450744).

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

219638199816 is a wasteful number, since it uses less digits than its factorization.

219638199816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10134715 (or 10134708 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 219638199816 in words is "two hundred nineteen billion, six hundred thirty-eight million, one hundred ninety-nine thousand, eight hundred sixteen".