11328621997 has 16 divisors (see below), whose sum is σ = 14867366400. Its totient is φ = 8362891440.

The previous prime is 11328621991. The next prime is 11328622007. The reversal of 11328621997 is 79912682311.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11328621997 - 2¹⁵ = 11328589229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11328621997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11328621991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3870247 + ... + 3873172.

It is an arithmetic number, because the mean of its divisors is an integer number (929210400).

Almost surely, 2^11328621997 is an apocalyptic number.

It is an amenable number.

11328621997 is a deficient number, since it is larger than the sum of its proper divisors (3538744403).

11328621997 is a wasteful number, since it uses less digits than its factorization.

11328621997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7743456.

The product of its digits is 326592, while the sum is 49.

The spelling of 11328621997 in words is "eleven billion, three hundred twenty-eight million, six hundred twenty-one thousand, nine hundred ninety-seven".