197788214772 has 120 divisors (see below), whose sum is σ = 536927529600. Its totient is φ = 63413146944.

The previous prime is 197788214761. The next prime is 197788214791. The reversal of 197788214772 is 277412887791.

197788214772 is a `hidden beast` number, since 1 + 97 + 78 + 8 + 2 + 1 + 477 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2431129 + ... + 2511167.

It is an arithmetic number, because the mean of its divisors is an integer number (4474396080).

Almost surely, 2^197788214772 is an apocalyptic number.

197788214772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197788214772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268463764800).

197788214772 is an abundant number, since it is smaller than the sum of its proper divisors (339139314828).

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

197788214772 is a wasteful number, since it uses less digits than its factorization.

197788214772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80347 (or 80336 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 63.

The spelling of 197788214772 in words is "one hundred ninety-seven billion, seven hundred eighty-eight million, two hundred fourteen thousand, seven hundred seventy-two".