197987991552 has 680 divisors, whose sum is σ = 674984192960. Its totient is φ = 57330892800.

The previous prime is 197987991541. The next prime is 197987991559. The reversal of 197987991552 is 255199789791.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (197987991559) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1311178677 + ... + 1311178827.

Almost surely, 2^197987991552 is an apocalyptic number.

197987991552 is a gapful number since it is divisible by the number (12) 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 197987991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337492096480).

197987991552 is an abundant number, since it is smaller than the sum of its proper divisors (476996201408).

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

197987991552 is an equidigital number, since it uses as much as digits as its factorization.

197987991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 188 counting only the distinct ones).

The product of its digits is 128595600, while the sum is 72.

The spelling of 197987991552 in words is "one hundred ninety-seven billion, nine hundred eighty-seven million, nine hundred ninety-one thousand, five hundred fifty-two".