11209457405 has 4 divisors (see below), whose sum is σ = 13451348892. Its totient is φ = 8967565920.

The previous prime is 11209457383. The next prime is 11209457407. The reversal of 11209457405 is 50475490211.

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 6119776441 + 5089680964 = 78229^2 + 71342^2 .

It is not a de Polignac number, because 11209457405 - 2¹² = 11209453309 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 (11209457407) 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, 1120945736 + ... + 1120945745.

It is an arithmetic number, because the mean of its divisors is an integer number (3362837223).

Almost surely, 2^11209457405 is an apocalyptic number.

It is an amenable number.

11209457405 is a deficient number, since it is larger than the sum of its proper divisors (2241891487).

11209457405 is an equidigital number, since it uses as much as digits as its factorization.

11209457405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241891486.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 11209457405 in words is "eleven billion, two hundred nine million, four hundred fifty-seven thousand, four hundred five".