11388223642 has 4 divisors (see below), whose sum is σ = 17082335466. Its totient is φ = 5694111820.

The previous prime is 11388223633. The next prime is 11388223681. The reversal of 11388223642 is 24632288311.

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

It can be written as a sum of positive squares in only one way, i.e., 7231971681 + 4156251961 = 85041^2 + 64469^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 11388223595 and 11388223604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2847055909 + ... + 2847055912.

Almost surely, 2^11388223642 is an apocalyptic number.

11388223642 is a deficient number, since it is larger than the sum of its proper divisors (5694111824).

11388223642 is an equidigital number, since it uses as much as digits as its factorization.

11388223642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694111823.

The product of its digits is 110592, while the sum is 40.

The spelling of 11388223642 in words is "eleven billion, three hundred eighty-eight million, two hundred twenty-three thousand, six hundred forty-two".