11207643361 has 4 divisors (see below), whose sum is σ = 11208912532. Its totient is φ = 11206374192.

The previous prime is 11207643289. The next prime is 11207643371. The reversal of 11207643361 is 16334670211.

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 1138725025 + 10068918336 = 33745^2 + 100344^2 .

It is a cyclic number.

It is not a de Polignac number, because 11207643361 - 2⁷ = 11207643233 is a prime.

It is a super-2 number, since 2×11207643361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11207643371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621246 + ... + 639031.

It is an arithmetic number, because the mean of its divisors is an integer number (2802228133).

Almost surely, 2^11207643361 is an apocalyptic number.

It is an amenable number.

11207643361 is a deficient number, since it is larger than the sum of its proper divisors (1269171).

11207643361 is an equidigital number, since it uses as much as digits as its factorization.

11207643361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269170.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 11207643361 in words is "eleven billion, two hundred seven million, six hundred forty-three thousand, three hundred sixty-one".