196237780128 has 72 divisors (see below), whose sum is σ = 600978213108. Its totient is φ = 60380854272.

The previous prime is 196237780111. The next prime is 196237780133. The reversal of 196237780128 is 821087732691.

It is a happy number.

196237780128 is a `hidden beast` number, since 1 + 9 + 623 + 7 + 7 + 8 + 0 + 1 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 189736905744 + 6500874384 = 435588^2 + 80628^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26203225 + ... + 26210712.

Almost surely, 2^196237780128 is an apocalyptic number.

196237780128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

196237780128 is an abundant number, since it is smaller than the sum of its proper divisors (404740432980).

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

196237780128 is a wasteful number, since it uses less digits than its factorization.

196237780128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52413966 (or 52413955 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 196237780128 in words is "one hundred ninety-six billion, two hundred thirty-seven million, seven hundred eighty thousand, one hundred twenty-eight".