11381564 has 6 divisors (see below), whose sum is σ = 19917744. Its totient is φ = 5690780.

The previous prime is 11381561. The next prime is 11381581. The reversal of 11381564 is 46518311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1422692 + ... + 1422699.

It is an arithmetic number, because the mean of its divisors is an integer number (3319624).

Almost surely, 2^11381564 is an apocalyptic number.

It is an amenable number.

11381564 is a deficient number, since it is larger than the sum of its proper divisors (8536180).

11381564 is a wasteful number, since it uses less digits than its factorization.

11381564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845395 (or 2845393 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 11381564 is about 3373.6573625666. The cubic root of 11381564 is about 224.9403232680.

Adding to 11381564 its reverse (46518311), we get a palindrome (57899875).

The spelling of 11381564 in words is "eleven million, three hundred eighty-one thousand, five hundred sixty-four".