197478752552640 has 896 divisors, whose sum is σ = 787674623662080. Its totient is φ = 46211315318784.

The previous prime is 197478752552579. The next prime is 197478752552651. The reversal of 197478752552640 is 46255257874791.

197478752552640 is a `hidden beast` number, since 1 + 9 + 7 + 4 + 7 + 8 + 7 + 5 + 2 + 552 + 64 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 420853194 + ... + 421322166.

It is an arithmetic number, because the mean of its divisors is an integer number (879101142480).

Almost surely, 2^{197478752552640} is an apocalyptic number.

197478752552640 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 197478752552640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393837311831040).

197478752552640 is an abundant number, since it is smaller than the sum of its proper divisors (590195871109440).

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

197478752552640 is a wasteful number, since it uses less digits than its factorization.

197478752552640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469198 (or 469182 counting only the distinct ones).

The product of its (nonzero) digits is 1185408000, while the sum is 72.

The spelling of 197478752552640 in words is "one hundred ninety-seven trillion, four hundred seventy-eight billion, seven hundred fifty-two million, five hundred fifty-two thousand, six hundred forty".