197066491955736 has 128 divisors (see below), whose sum is σ = 531981217797120. Its totient is φ = 60474049979904.

The previous prime is 197066491955713. The next prime is 197066491955741. The reversal of 197066491955736 is 637559194660791.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174772981 + ... + 175896923.

It is an arithmetic number, because the mean of its divisors is an integer number (4156103264040).

Almost surely, 2^{197066491955736} 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 197066491955736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265990608898560).

197066491955736 is an abundant number, since it is smaller than the sum of its proper divisors (334914725841384).

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

197066491955736 is a wasteful number, since it uses less digits than its factorization.

197066491955736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125465 (or 1125461 counting only the distinct ones).

The product of its (nonzero) digits is 2314720800, while the sum is 78.

The spelling of 197066491955736 in words is "one hundred ninety-seven trillion, sixty-six billion, four hundred ninety-one million, nine hundred fifty-five thousand, seven hundred thirty-six".