11385356565 has 32 divisors (see below), whose sum is σ = 20169248256. Its totient is φ = 5437776960.

The previous prime is 11385356557. The next prime is 11385356581. The reversal of 11385356565 is 56565358311.

It is not a de Polignac number, because 11385356565 - 2³ = 11385356557 is a prime.

It is a super-2 number, since 2×11385356565² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503887 + ... + 525996.

It is an arithmetic number, because the mean of its divisors is an integer number (630289008).

Almost surely, 2^11385356565 is an apocalyptic number.

11385356565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11385356565 is a deficient number, since it is larger than the sum of its proper divisors (8783891691).

11385356565 is a wasteful number, since it uses less digits than its factorization.

11385356565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029969.

The product of its digits is 1620000, while the sum is 48.

The spelling of 11385356565 in words is "eleven billion, three hundred eighty-five million, three hundred fifty-six thousand, five hundred sixty-five".