197516645056 has 56 divisors (see below), whose sum is σ = 402877105344. Its totient is φ = 96037294080.

The previous prime is 197516645021. The next prime is 197516645069. The reversal of 197516645056 is 650546615791.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 197516644988 and 197516645006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125641 + ... + 640951.

It is an arithmetic number, because the mean of its divisors is an integer number (7194234024).

Almost surely, 2^197516645056 is an apocalyptic number.

197516645056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197516645056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201438552672).

197516645056 is an abundant number, since it is smaller than the sum of its proper divisors (205360460288).

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

197516645056 is a wasteful number, since it uses less digits than its factorization.

197516645056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515489 (or 515479 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 197516645056 in words is "one hundred ninety-seven billion, five hundred sixteen million, six hundred forty-five thousand, fifty-six".