197829216378 has 16 divisors (see below), whose sum is σ = 439620480960. Its totient is φ = 65943072108.

The previous prime is 197829216353. The next prime is 197829216379. The reversal of 197829216378 is 873612928791.

197829216378 is a `hidden beast` number, since 1 + 97 + 82 + 92 + 16 + 378 = 666.

It is not an unprimeable number, because it can be changed into a prime (197829216379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1831751950 + ... + 1831752057.

It is an arithmetic number, because the mean of its divisors is an integer number (27476280060).

Almost surely, 2^197829216378 is an apocalyptic number.

197829216378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

197829216378 is an abundant number, since it is smaller than the sum of its proper divisors (241791264582).

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

197829216378 is a wasteful number, since it uses less digits than its factorization.

197829216378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663504018 (or 3663504012 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 197829216378 in words is "one hundred ninety-seven billion, eight hundred twenty-nine million, two hundred sixteen thousand, three hundred seventy-eight".