197665115648 has 640 divisors, whose sum is σ = 574163251200. Its totient is φ = 66762178560.

The previous prime is 197665115639. The next prime is 197665115657. The reversal of 197665115648 is 846511566791.

It is an interprime number because it is at equal distance from previous prime (197665115639) and next prime (197665115657).

It is a super-3 number, since 3×197665115648³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 426922265 + ... + 426922727.

It is an arithmetic number, because the mean of its divisors is an integer number (897130080).

Almost surely, 2^197665115648 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 197665115648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287081625600).

197665115648 is an abundant number, since it is smaller than the sum of its proper divisors (376498135552).

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

197665115648 is a wasteful number, since it uses less digits than its factorization.

197665115648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 513 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 59.

It can be divided in two parts, 197665 and 115648, that added together give a palindrome (313313).

The spelling of 197665115648 in words is "one hundred ninety-seven billion, six hundred sixty-five million, one hundred fifteen thousand, six hundred forty-eight".