36139838261 has 4 divisors (see below), whose sum is σ = 36182009292. Its totient is φ = 36097667232.

The previous prime is 36139838249. The next prime is 36139838279. The reversal of 36139838261 is 16283893163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16684888900 + 19454949361 = 129170^2 + 139481^2 .

It is a cyclic number.

It is not a de Polignac number, because 36139838261 - 2⁶ = 36139838197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36139838461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21084230 + ... + 21085943.

It is an arithmetic number, because the mean of its divisors is an integer number (9045502323).

Almost surely, 2^36139838261 is an apocalyptic number.

It is an amenable number.

36139838261 is a deficient number, since it is larger than the sum of its proper divisors (42171031).

36139838261 is an equidigital number, since it uses as much as digits as its factorization.

36139838261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42171030.

The product of its digits is 1119744, while the sum is 50.

The spelling of 36139838261 in words is "thirty-six billion, one hundred thirty-nine million, eight hundred thirty-eight thousand, two hundred sixty-one".