196135395840 has 400 divisors, whose sum is σ = 704077704000. Its totient is φ = 52185047040.

The previous prime is 196135395787. The next prime is 196135395857. The reversal of 196135395840 is 48593531691.

196135395840 is a `hidden beast` number, since 1 + 9 + 6 + 1 + 3 + 53 + 9 + 584 + 0 = 666.

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 39 ways as a sum of consecutive naturals, for example, 130843411 + ... + 130844909.

It is an arithmetic number, because the mean of its divisors is an integer number (1760194260).

Almost surely, 2^196135395840 is an apocalyptic number.

196135395840 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 196135395840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352038852000).

196135395840 is an abundant number, since it is smaller than the sum of its proper divisors (507942308160).

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

196135395840 is an equidigital number, since it uses as much as digits as its factorization.

196135395840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 196135395840 in words is "one hundred ninety-six billion, one hundred thirty-five million, three hundred ninety-five thousand, eight hundred forty".