197142827440 has 160 divisors (see below), whose sum is σ = 516026972160. Its totient is φ = 69497945088.

The previous prime is 197142827407. The next prime is 197142827449. The reversal of 197142827440 is 44728241791.

It is a happy number.

It is a super-2 number, since 2×197142827440² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197142827449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13459641 + ... + 13474279.

It is an arithmetic number, because the mean of its divisors is an integer number (3225168576).

Almost surely, 2^197142827440 is an apocalyptic number.

197142827440 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 197142827440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258013486080).

197142827440 is an abundant number, since it is smaller than the sum of its proper divisors (318884144720).

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

197142827440 is a wasteful number, since it uses less digits than its factorization.

197142827440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251 (or 15245 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 197142827440 in words is "one hundred ninety-seven billion, one hundred forty-two million, eight hundred twenty-seven thousand, four hundred forty".