11103661643 has 4 divisors (see below), whose sum is σ = 11152576680. Its totient is φ = 11054746608.

The previous prime is 11103661609. The next prime is 11103661661. The reversal of 11103661643 is 34616630111.

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 11103661643 - 2²² = 11099467339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11103661663) 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, 24457178 + ... + 24457631.

It is an arithmetic number, because the mean of its divisors is an integer number (2788144170).

Almost surely, 2^11103661643 is an apocalyptic number.

11103661643 is a deficient number, since it is larger than the sum of its proper divisors (48915037).

11103661643 is an equidigital number, since it uses as much as digits as its factorization.

11103661643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48915036.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 11103661643 in words is "eleven billion, one hundred three million, six hundred sixty-one thousand, six hundred forty-three".