197855936100 has 81 divisors (see below), whose sum is σ = 620210269497. Its totient is φ = 52758024480.

The previous prime is 197855936029. The next prime is 197855936101. The reversal of 197855936100 is 1639558791.

The square root of 197855936100 is 444810.

It is a perfect power (a square), and thus also a powerful number.

197855936100 is a `hidden beast` number, since 1 + 9 + 78 + 559 + 3 + 6 + 10 + 0 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71228136996 + 126627799104 = 266886^2 + 355848^2 .

It is not an unprimeable number, because it can be changed into a prime (197855936101) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13336887 + ... + 13351713.

Almost surely, 2^197855936100 is an apocalyptic number.

197855936100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197855936100 is the 444810-th square number.

It is an amenable number.

197855936100 is an abundant number, since it is smaller than the sum of its proper divisors (422354333397).

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

197855936100 is an equidigital number, since it uses as much as digits as its factorization.

197855936100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29674 (or 14837 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 54.

The spelling of 197855936100 in words is "one hundred ninety-seven billion, eight hundred fifty-five million, nine hundred thirty-six thousand, one hundred".