196726390506 has 36 divisors (see below), whose sum is σ = 452788376742. Its totient is φ = 61718081664.

The previous prime is 196726390493. The next prime is 196726390529. The reversal of 196726390506 is 605093627691.

196726390506 is a `hidden beast` number, since 1 + 9 + 6 + 72 + 63 + 9 + 0 + 506 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 195681484881 + 1044905625 = 442359^2 + 32325^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18903525 + ... + 18913928.

Almost surely, 2^196726390506 is an apocalyptic number.

196726390506 is an abundant number, since it is smaller than the sum of its proper divisors (256061986236).

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

196726390506 is a wasteful number, since it uses less digits than its factorization.

196726390506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37817495 (or 37817475 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 196726390506 in words is "one hundred ninety-six billion, seven hundred twenty-six million, three hundred ninety thousand, five hundred six".