197771391328 has 48 divisors (see below), whose sum is σ = 445333109760. Its totient is φ = 84692981376.

The previous prime is 197771391299. The next prime is 197771391329. The reversal of 197771391328 is 823193177791.

It is a super-2 number, since 2×197771391328² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197771391329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56688 + ... + 631471.

It is an arithmetic number, because the mean of its divisors is an integer number (9277773120).

Almost surely, 2^197771391328 is an apocalyptic number.

It is an amenable number.

197771391328 is an abundant number, since it is smaller than the sum of its proper divisors (247561718432).

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

197771391328 is a wasteful number, since it uses less digits than its factorization.

197771391328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689459 (or 689451 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 58.

The spelling of 197771391328 in words is "one hundred ninety-seven billion, seven hundred seventy-one million, three hundred ninety-one thousand, three hundred twenty-eight".