11000663521 has 4 divisors (see below), whose sum is σ = 11019404592. Its totient is φ = 10981922452.

The previous prime is 11000663519. The next prime is 11000663551. The reversal of 11000663521 is 12536600011.

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 11000663521 - 2¹ = 11000663519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11000663551) 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, 9369655 + ... + 9370828.

It is an arithmetic number, because the mean of its divisors is an integer number (2754851148).

Almost surely, 2^11000663521 is an apocalyptic number.

It is an amenable number.

11000663521 is a deficient number, since it is larger than the sum of its proper divisors (18741071).

11000663521 is an equidigital number, since it uses as much as digits as its factorization.

11000663521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18741070.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 11000663521 in words is "eleven billion, six hundred sixty-three thousand, five hundred twenty-one".