196640297723520 has 2048 divisors, whose sum is σ = 823350528000000. Its totient is φ = 44330953605120.

The previous prime is 196640297723501. The next prime is 196640297723521. The reversal of 196640297723520 is 25327792046691.

196640297723520 is a `hidden beast` number, since 1 + 9 + 6 + 64 + 0 + 29 + 7 + 7 + 23 + 520 = 666.

It is a super-2 number, since 2×196640297723520² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (196640297723521) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 328280964181 + ... + 328280964779.

It is an arithmetic number, because the mean of its divisors is an integer number (402026625000).

Almost surely, 2^{196640297723520} is an apocalyptic number.

196640297723520 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 196640297723520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411675264000000).

196640297723520 is an abundant number, since it is smaller than the sum of its proper divisors (626710230276480).

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

196640297723520 is an equidigital number, since it uses as much as digits as its factorization.

196640297723520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 196640297723520 in words is "one hundred ninety-six trillion, six hundred forty billion, two hundred ninety-seven million, seven hundred twenty-three thousand, five hundred twenty".