11217051605 has 16 divisors (see below), whose sum is σ = 14432670720. Its totient is φ = 8338866432.

The previous prime is 11217051589. The next prime is 11217051613. The reversal of 11217051605 is 50615071211.

It is a cyclic number.

It is not a de Polignac number, because 11217051605 - 2⁴ = 11217051589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 828509 + ... + 841938.

It is an arithmetic number, because the mean of its divisors is an integer number (902041920).

Almost surely, 2^11217051605 is an apocalyptic number.

It is an amenable number.

11217051605 is a deficient number, since it is larger than the sum of its proper divisors (3215619115).

11217051605 is a wasteful number, since it uses less digits than its factorization.

11217051605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670548.

The product of its (nonzero) digits is 2100, while the sum is 29.

The spelling of 11217051605 in words is "eleven billion, two hundred seventeen million, fifty-one thousand, six hundred five".