11209631057 has 4 divisors (see below), whose sum is σ = 11209847460. Its totient is φ = 11209414656.

The previous prime is 11209631033. The next prime is 11209631107. The reversal of 11209631057 is 75013690211.

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 9838854481 + 1370776576 = 99191^2 + 37024^2 .

It is a cyclic number.

It is not a de Polignac number, because 11209631057 - 2³² = 6914663761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11209631357) 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, 20633 + ... + 151145.

It is an arithmetic number, because the mean of its divisors is an integer number (2802461865).

Almost surely, 2^11209631057 is an apocalyptic number.

It is an amenable number.

11209631057 is a deficient number, since it is larger than the sum of its proper divisors (216403).

11209631057 is an equidigital number, since it uses as much as digits as its factorization.

11209631057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216402.

The product of its (nonzero) digits is 11340, while the sum is 35.

The spelling of 11209631057 in words is "eleven billion, two hundred nine million, six hundred thirty-one thousand, fifty-seven".