197885921138136 has 384 divisors, whose sum is σ = 669876711528960. Its totient is φ = 51269046681600.

The previous prime is 197885921138123. The next prime is 197885921138137. The reversal of 197885921138136 is 631831129588791.

It is a happy number.

197885921138136 is a `hidden beast` number, since 1 + 9 + 7 + 8 + 8 + 592 + 1 + 13 + 8 + 13 + 6 = 666.

197885921138136 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197885921138137) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4129740450 + ... + 4129788366.

It is an arithmetic number, because the mean of its divisors is an integer number (1744470602940).

Almost surely, 2^{197885921138136} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197885921138136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334938355764480).

197885921138136 is an abundant number, since it is smaller than the sum of its proper divisors (471990790390824).

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

197885921138136 is a wasteful number, since it uses less digits than its factorization.

197885921138136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49815 (or 49808 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 72.

The spelling of 197885921138136 in words is "one hundred ninety-seven trillion, eight hundred eighty-five billion, nine hundred twenty-one million, one hundred thirty-eight thousand, one hundred thirty-six".