11311403641 has 4 divisors (see below), whose sum is σ = 11348248912. Its totient is φ = 11274558372.

The previous prime is 11311403599. The next prime is 11311403651. The reversal of 11311403641 is 14630411311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11311403641 - 2¹⁹ = 11310879353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311403651) 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, 18422175 + ... + 18422788.

It is an arithmetic number, because the mean of its divisors is an integer number (2837062228).

Almost surely, 2^11311403641 is an apocalyptic number.

It is an amenable number.

11311403641 is a deficient number, since it is larger than the sum of its proper divisors (36845271).

11311403641 is an equidigital number, since it uses as much as digits as its factorization.

11311403641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36845270.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 11311403641 its reverse (14630411311), we get a palindrome (25941814952).

The spelling of 11311403641 in words is "eleven billion, three hundred eleven million, four hundred three thousand, six hundred forty-one".