197475493347864 has 128 divisors (see below), whose sum is σ = 567714774456000. Its totient is φ = 63526607649792.

The previous prime is 197475493347863. The next prime is 197475493347877. The reversal of 197475493347864 is 468743394574791.

197475493347864 is a `hidden beast` number, since 1 + 9 + 7 + 4 + 7 + 5 + 493 + 3 + 47 + 86 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197475493347863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6739444 + ... + 20985020.

Almost surely, 2^{197475493347864} 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 197475493347864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283857387228000).

197475493347864 is an abundant number, since it is smaller than the sum of its proper divisors (370239281108136).

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

197475493347864 is a wasteful number, since it uses less digits than its factorization.

197475493347864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14247834 (or 14247824 counting only the distinct ones).

The product of its digits is 15362887680, while the sum is 81.

The spelling of 197475493347864 in words is "one hundred ninety-seven trillion, four hundred seventy-five billion, four hundred ninety-three million, three hundred forty-seven thousand, eight hundred sixty-four".