197465585640 has 256 divisors, whose sum is σ = 641291040000. Its totient is φ = 48472473600.

The previous prime is 197465585587. The next prime is 197465585699. The reversal of 197465585640 is 46585564791.

It is a Cunningham number, because it is equal to 444371²-1.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101315386 + ... + 101317334.

It is an arithmetic number, because the mean of its divisors is an integer number (2505043125).

Almost surely, 2^197465585640 is an apocalyptic number.

197465585640 is a gapful number since it is divisible by the number (10) 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 197465585640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320645520000).

197465585640 is an abundant number, since it is smaller than the sum of its proper divisors (443825454360).

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

197465585640 is a wasteful number, since it uses less digits than its factorization.

197465585640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220 (or 3216 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 60.

The spelling of 197465585640 in words is "one hundred ninety-seven billion, four hundred sixty-five million, five hundred eighty-five thousand, six hundred forty".