11350381665 has 32 divisors (see below), whose sum is σ = 21657378816. Its totient is φ = 4963147200.

The previous prime is 11350381663. The next prime is 11350381673. The reversal of 11350381665 is 56618305311.

It is not a de Polignac number, because 11350381665 - 2¹ = 11350381663 is a prime.

It is a super-3 number, since 3×11350381665³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11350381663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2347561 + ... + 2352390.

It is an arithmetic number, because the mean of its divisors is an integer number (676793088).

Almost surely, 2^11350381665 is an apocalyptic number.

11350381665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11350381665 is a deficient number, since it is larger than the sum of its proper divisors (10306997151).

11350381665 is a wasteful number, since it uses less digits than its factorization.

11350381665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699989.

The product of its (nonzero) digits is 64800, while the sum is 39.

Adding to 11350381665 its reverse (56618305311), we get a palindrome (67968686976).

The spelling of 11350381665 in words is "eleven billion, three hundred fifty million, three hundred eighty-one thousand, six hundred sixty-five".