197868818900 has 36 divisors (see below), whose sum is σ = 429676540608. Its totient is φ = 79092006240.

The previous prime is 197868818887. The next prime is 197868818911. The reversal of 197868818900 is 9818868791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550604 + ... + 836003.

Almost surely, 2^197868818900 is an apocalyptic number.

197868818900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197868818900 is an abundant number, since it is smaller than the sum of its proper divisors (231807721708).

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

197868818900 is a wasteful number, since it uses less digits than its factorization.

197868818900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388048 (or 1388041 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 65.

The spelling of 197868818900 in words is "one hundred ninety-seven billion, eight hundred sixty-eight million, eight hundred eighteen thousand, nine hundred".