11271664 has 20 divisors (see below), whose sum is σ = 21907080. Its totient is φ = 5618240.

The previous prime is 11271661. The next prime is 11271677. The reversal of 11271664 is 46617211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11271661) 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, 5319 + ... + 7129.

It is an arithmetic number, because the mean of its divisors is an integer number (1095354).

Almost surely, 2^11271664 is an apocalyptic number.

It is an amenable number.

11271664 is a deficient number, since it is larger than the sum of its proper divisors (10635416).

11271664 is a wasteful number, since it uses less digits than its factorization.

11271664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208 (or 2202 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 11271664 is about 3357.3298914465. The cubic root of 11271664 is about 224.2139749581.

Adding to 11271664 its reverse (46617211), we get a palindrome (57888875).

It can be divided in two parts, 11271 and 664, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 11271664 in words is "eleven million, two hundred seventy-one thousand, six hundred sixty-four".