197856138480 has 960 divisors, whose sum is σ = 851939472384. Its totient is φ = 36683366400.

The previous prime is 197856138407. The next prime is 197856138499. The reversal of 197856138480 is 84831658791.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 230870212 + ... + 230871068.

Almost surely, 2^197856138480 is an apocalyptic number.

197856138480 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 197856138480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425969736192).

197856138480 is an abundant number, since it is smaller than the sum of its proper divisors (654083333904).

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

197856138480 is a wasteful number, since it uses less digits than its factorization.

197856138480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 197856138480 in words is "one hundred ninety-seven billion, eight hundred fifty-six million, one hundred thirty-eight thousand, four hundred eighty".