11601209256 has 64 divisors (see below), whose sum is σ = 35696035200. Its totient is φ = 3059659008.

The previous prime is 11601209237. The next prime is 11601209261. The reversal of 11601209256 is 65290210611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2653771 + ... + 2658138.

It is an arithmetic number, because the mean of its divisors is an integer number (557750550).

Almost surely, 2^11601209256 is an apocalyptic number.

It is an amenable number.

11601209256 is an abundant number, since it is smaller than the sum of its proper divisors (24094825944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11601209256 is a wasteful number, since it uses less digits than its factorization.

11601209256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5311938 (or 5311934 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

Adding to 11601209256 its reverse (65290210611), we get a palindrome (76891419867).

The spelling of 11601209256 in words is "eleven billion, six hundred one million, two hundred nine thousand, two hundred fifty-six".