236706586138 has 12 divisors (see below), whose sum is σ = 390272429610. Its totient is φ = 107593902680.

The previous prime is 236706586099. The next prime is 236706586141. The reversal of 236706586138 is 831685607632.

It can be written as a sum of positive squares in only one way, i.e., 206358507289 + 30348078849 = 454267^2 + 174207^2 .

It is a super-2 number, since 2×236706586138² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 489062953 + ... + 489063436.

Almost surely, 2^236706586138 is an apocalyptic number.

236706586138 is a deficient number, since it is larger than the sum of its proper divisors (153565843472).

236706586138 is a wasteful number, since it uses less digits than its factorization.

236706586138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978126413 (or 978126402 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 236706586138 in words is "two hundred thirty-six billion, seven hundred six million, five hundred eighty-six thousand, one hundred thirty-eight".