196704728640 has 448 divisors, whose sum is σ = 802874411520. Its totient is φ = 44959961088.

The previous prime is 196704728611. The next prime is 196704728651. The reversal of 196704728640 is 46827407691.

196704728640 is a `hidden beast` number, since 1 + 96 + 7 + 0 + 472 + 86 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4878804 + ... + 4918956.

Almost surely, 2^196704728640 is an apocalyptic number.

196704728640 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 196704728640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401437205760).

196704728640 is an abundant number, since it is smaller than the sum of its proper divisors (606169682880).

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

196704728640 is an frugal number, since it uses more digits than its factorization.

196704728640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40198 (or 40170 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 196704728640 in words is "one hundred ninety-six billion, seven hundred four million, seven hundred twenty-eight thousand, six hundred forty".