11421647599 has 4 divisors (see below), whose sum is σ = 11427170040. Its totient is φ = 11416125160.

The previous prime is 11421647581. The next prime is 11421647621. The reversal of 11421647599 is 99574612411.

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

It is a cyclic number.

It is not a de Polignac number, because 11421647599 - 2³³ = 2831713007 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 (11421647539) 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, 2758117 + ... + 2762254.

It is an arithmetic number, because the mean of its divisors is an integer number (2856792510).

Almost surely, 2^11421647599 is an apocalyptic number.

11421647599 is a deficient number, since it is larger than the sum of its proper divisors (5522441).

11421647599 is an equidigital number, since it uses as much as digits as its factorization.

11421647599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522440.

The product of its digits is 544320, while the sum is 49.

The spelling of 11421647599 in words is "eleven billion, four hundred twenty-one million, six hundred forty-seven thousand, five hundred ninety-nine".